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Step-by-Step

1. Add one sprite to represent a predator and another sprite to represent its prey.

2. Add a background that represents a habitat.

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Step-by-Step

3. Make the predator sprite always point toward the mouse pointer and move toward it.

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Step-by-Step

4. Create an algorithm (including a loop) to make the prey hide if it is touched by the predator.

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Insert the “touching” block from the sensing category into the diamond of the if/then statement

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Step-by-Step

5. Add code to make the prey reappear in a random spot on the screen.

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Where would you add these blocks to the code sequence you have already created?

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Step-by-Step

6. Add sound effects that will start when the prey is touched by the predator sprite.

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Where would you add these blocks to the code sequence you have already created?

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Step-by-Step

7. Add a starting location for the sprite and a “show” block.

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Step-by-Step

8. Duplicate the prey sprite to make multiple prey.

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9. Drag the copies of the prey sprites to different locations on the stage to spread them out. Don’t forget to give each sprite a different starting location.

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Right Click on a sprite and select “duplicate”.

A copy will be made of the sprite and all its code.

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Revise

Can you add a scorekeeping variable?

Can you make your predator move with the arrow keys?

Can you add other sound effects. (Ocean noises, music, etc)

Predator/Prey

Can you make different levels?

Debug

Does everything work the way you want it to?

Is there anything you want to change?

score

5

Animate the predator to do something when he eats the prey.