Build a script that, when launched by clicking on the green flaggreen flaggreen flag, will cause the cat-spritespritesprite to go 10 steps forward. You can try to create it yourself or use the instructions below.

• Compare the results with a slideshow. Does your script look similar?

• Think about what you need to do to make the sprite go backwards.

Instruction

Step 1.
Select the Events category and drag the blockblockblock when green flag clicked into the script areascript areascript area.

Step 2.
Choose the Motion category and drag the block move … steps to the script area and connect it to the green flaggreen flaggreen flag block.

Step 3.
Choose the Control category, drag the block, stop ...and connect it to the previous block. Click on the drop down list in this block and select this script option.

Step 4.
Check how the script works. Click on the green flag several times. The cat‑sprite should move 10 steps forward with each click. You can check if the cat‑sprite actually moves by looking at the counter in the upper right corner of the panel.

If the cat‑sprite reaches the edge of the stage, you can grab it with the mouse (e.g. by the tail) and move it to any place in the stage.

Step 5.
If your script works correctly, experiment with the amount of steps performed by the sprite. Increase or decrease the numbernumbernumber of steps in the blockblockblock window. Check what will happen if you enter a minus sign in front of the number of steps, e.g. -20.

Practice running the script using the keyboard.

In your script, replace the block when green flag clicked with when ... keykeykey pressed selecting the space barspace barspace bar as the start key. Restart the script by pressing the space bar.

Instruction

Go to the Events category. Detach the blockblockblock with the green flaggreen flaggreen flag from the remaining blocks and drag it to the left. Enter a new block when ... keykeykey pressed and select the space from its drop‑down menudrop‑down menudrop‑down menu. Run your script again by pressing the space barspace barspace bar.

Your sprite can move, but only in one direction. You will get more motion possibilities when you apply turns.

Create a new script that will turn the spritespritesprite when you press a selected key (e.g., right arrow or left arrow). Combine rotationrotationrotation with movement of the sprite. If you have no idea how to do it, follow the instructions.

Turning right

Create a new script:

• Enter a blockblockblock when ... keykeykey pressed and select from the drop‑down menudrop‑down menudrop‑down menu the key with which you want to run the script.

• Add a block turn right ... degrees. Enter the numbernumbernumber of degrees you want the sprite to turn by.

• Add another block that moves the sprite with the required number of steps.

• Add a block ending the script.

Turning left

Create a new script:

• Enter a block when ... key pressed and select from the drop‑down menudrop‑down menudrop‑down menu the key with which you want to run the script.

• Add a block turn left ... degrees. Enter the number of degrees you want the sprite to turn by.

• Add another block that moves the sprite with the required number of steps.

• Add a block ending the script.

Find in the program the blocks shown in the figure and create a script to move the sprite to the desired location. Check what option in the blockblockblock point in direction ... you have to choose for the sprite to look down. Try out the settings you need to set for the blocks set x to ... and set y to ... for the spritespritesprite to be in the upper left corner of the stage.

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Na ilustracji pokazany jest zrzut ekranu, na którym widoczna jest scena z duszkiem stojącym na środku. Obok widoczny jest skrypt ustawiający duszka w żądanej pozycji.

Your sprite can also leave a trailtrailtrail behind itself. Sometimes this function is useful if we want to check if the sprite is moving along the path we want. To create trails, we use blocks in the Pen category.

Build two additional scripts:

1. The first script causes to lower the pen on the stage after pressing the selected key,

2. The second script causes to raise the pen above the stage after pressing the selected key.

Once the scripts works expand them and add changing colour and thickness.
If you have no idea how to do it, look at the hint.

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Na ilustracji przedstawione są dwa skrypty powodujące opuszczanie i podnoszenie pisaka.

The spritespritesprite leaves a lot of trails. To get rid of them, you need to clear the stage. You can combine this action with placing the sprite in the starting position after restarting the program, e.g. using the following script.

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Na ilustracji przedstawiony jest skrypt ustawiający duszka w pozycji wyjściowej i czyszczący ekran ze wszystkich śladów.

Write a script in which the sprite moves from one corner of the stage to another. Plan your route so that the sprite changes its direction at least three times.

Explain in English how to build a script that causes the sprite to leave trails on the stage.