We've created a starter project that has some custom sprites for this game.

Go to the starter project at the below link and click on the Remix button to create a copy of the project.

https://scratch.mit.edu/projects/281652790/editor/

In this game coloured balls will move towards the disc in the middle. You need to spin the wheel to match the colour of each ball as it hits the wheel. So we'll program the left and right arrow keys on our keyboard to spin the wheel in each direction.

Add the following code to the 'wheel' sprite:

when green flag clicked go to x[0] y [0] // place it in the center set size to [30]% // resize the wheel to 30% forever if < key (left arrow v) pressed? > then turn ccw (3) degrees // turn anti clockwise end if < key (right arrow v) pressed? > then turn cw (3) degrees // turn clockwise end end

Once you've added the code, click the green flag and test if your arrow keys spin the ball!

Show: Scratch: Using a tablet or iPad? Tap here for different controls

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Since your tablet or iPad doesn’t have a physical keyboard, you’ll use on-screen buttons to complete this task. Wherever the instructions in this lesson mention pressing a key, you’ll need to tap a button on the screen instead. So, while your steps are a little different, you’ll still be able to make everything happen in your project.

So for example, instead of doing either of these:

when [left arrow v] key pressed move (10) steps if < key [left arrow v] pressed? > then move (10) steps end

You need to add an on-screen button (like an arrow sprite) and use this code:

when this sprite clicked move (10) steps

Now, just tap the button on the screen to perform the same action!

In the game, the balls should appear every few seconds, in a random position and start moving towards the wheel.

Add the following code to the green ball called 'Sprite1':

when green flag clicked hide forever wait (pick random (4) to (8)) seconds // wait a random number of seconds create clone of (myself v) // create the clone end when I start as a clone go to (random position v) // start in a random position point towards (wheel v) // point in the direction of the wheel show

We don't want the balls appearing too close to the wheel as it won't give us much time to react. So to prevent this add the following code to 'Sprite1' which detects where the ball is when it's cloned and deletes it if it's too close.

when I start as a clone go to (random position v) point towards (wheel v) show // add new code under here if < ( distance to (wheel v)) < (100) > then delete this clone end

Now that they're appearing randomly every few seconds we need to make them start moving towards the wheel. We've already used a block to point them at the wheel so now we just need to add this code to 'Sprite1':

when I start as a clone go to (random position v) point towards (wheel v) show if < ( distance to (wheel v)) < (100) > then delete this clone end forever // add this code move (2) steps end