scratch lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · scratch primary lesson 7...
TRANSCRIPT
![Page 1: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/1.jpg)
Scratch Primary Lesson 7
Good Guy / Bad Guy Game
creativecomputerlab.com
![Page 2: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/2.jpg)
The Game Idea
• This is a two character game. It has a good guy and a bad guy.
• You (the player) are the good guy.• You start out with 5 lives.• You must escape from the bad guy.• You can move by using the arrow keys.• If the bad guy touches you, you lose one life.
creativecomputerlab.com
![Page 3: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/3.jpg)
Choose the Characters
• Start a new Scratch project and delete the cat.• Create new sprites. Search through the sprite folders and find:– A good guy – that will be you.– A bad guy.
creativecomputerlab.com
![Page 4: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/4.jpg)
Choose the Characters
• You can choose any characters you’d like. For this example we will use these characters:
• Good guy (or girl):
• Bad guy (or ghoul):
creativecomputerlab.com
![Page 5: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/5.jpg)
Give the Sprites Their Own Names• GoodGirl:
• BadGuy:
• Giving your own name to sprites makes them easier to find when you are making your scripts.
creativecomputerlab.com
![Page 6: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/6.jpg)
Moving the Good Guy• First, we will enable the player (good guy) to move around by using the arrow keys.
creativecomputerlab.com
![Page 7: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/7.jpg)
Moving the Bad Guy
• Second, we will make the bad guy move around the screen automatically:
creativecomputerlab.com
![Page 8: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/8.jpg)
How to Score?
• A score is made when the bad guy touches the good guy. The good guy loses one life.
• We need to make a script that detects when the sprites are touching.
• The script logic is: “If touched by the bad guy, the good guy loses one life”.
• We will put this script in the good guy’s script area.
creativecomputerlab.com
![Page 9: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/9.jpg)
Sprite Sensing
• The sensing blocks help a sprite sense the world around it.
• We want the good guy sprite to know when it is touching the bad guy sprite.
creativecomputerlab.com
![Page 10: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/10.jpg)
Good Guy Scoring Script• Use the “if” and “touching” blocks:
• What block do we need to use so that the good guy is always checking whether it is touching the bad guy?
creativecomputerlab.com
![Page 11: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/11.jpg)
Good Guy Scoring Script
• The good guy must keep checking whether the bad guy is touching. This is called “polling”.
• We use the “forever” loop to keep checking constantly:
creativecomputerlab.com
![Page 12: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/12.jpg)
Test the Game• Click the green flag and test whether the good guy says something when it is touched by the bad guy:
creativecomputerlab.com
![Page 13: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/13.jpg)
Keeping Score
• We need to write a script to keep score.
• The script must:– Start the game with 5 lives– Subtract 1 life when touched by the bad guy– End the game when good guy runs out of lives
• We must keep the current score in a variable
creativecomputerlab.com
![Page 14: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/14.jpg)
Variables and Data• A variable is a place to hold a number or letters so it can be used by the computer.
• The value of the data which the variable is holding can be any value and it can be changed at any time. It is called a variable because its value can vary.
• In our game, the score is the data. We are going to see how we can create a variable to hold the score…
creativecomputerlab.com
![Page 15: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/15.jpg)
Variables in Scratch• Go to the “Data” palette to create a variable. Notice that there are no variables created yet.
• Click the “Make a variable” button.creativecomputerlab.com
![Page 16: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/16.jpg)
Make the “Lives” Variable
• Give the new variable the name “Lives”– Make it for all sprites:
creativecomputerlab.com
![Page 17: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/17.jpg)
Make the “Lives” Variable
• The variable “Lives” is created with value 0:
• You can:• Set “Lives” to any value.• Change “Lives” by any value.• Hide “Lives”.• Show “Lives”.
creativecomputerlab.com
![Page 18: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/18.jpg)
Adding Scoring to The Game• We want to set “Lives” to 5 when the game starts.
• Every time the bad guy touches the good guy, we lose 1 life:
creativecomputerlab.com
![Page 19: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/19.jpg)
Adding Scoring to The Game• This is how the project should look:
– Click the check box by the “Lives” variable to show it
creativecomputerlab.com
![Page 20: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/20.jpg)
Click the Green Flag and Play The Game
• What happens to the good guy’s lives?
• What new features would you like to put into the game?
creativecomputerlab.com
![Page 21: Scratch Lesson 5scratch.ie/sites/all/themes/scratch_theme/resources... · Scratch Primary Lesson 7 Good Guy / Bad Guy Game creativecomputerlab.com. The Game Idea • This is a two](https://reader030.vdocument.in/reader030/viewer/2022040205/5ed67e6cff0e593c0b63f1f5/html5/thumbnails/21.jpg)
New Features For Good Guy / Bad Guy Game
• End the game when “Lives” becomes equal to 0.• Find a way to win the game:
– Create a timer and see how long you can last.– Create another “health” sprite that adds one life when the good guy touches it.
• Create a game over screen.– Create a “You Lose ” screen.– Create a “You Win ☺” Screen.
creativecomputerlab.com