(1) Click on: "Choose new sprite from file" and pick a sprite from the categories. Click on "Shrink sprite" and keep clicking on your sprite until it is a reasonable size.
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(2) Click on: "Conrol" and then "Motion" and place these tabs in the sprite's script in the following order:
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(3) Click on the green flag and your sprite should accomplish challenge a).
Challenge b)
(1) Click on: "Conrol", then "Motion" and then "Sensing" and add these tabs in the script from step (2) in the following order:
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(2) Click on the green flag and your sprite should accomplish challenge b).