1. Fill in the Init block with code that will clear the screen and move the sprite to the center. 2. Add code to have the sprite clone itself. When it starts as a clone, create a loop which will execute 20 times. Each time, it will increase the ghost effect by 5. After the loop completes, delete the clone. 3. Create a variable to control the duration of the ghost. Initialize it to 0.5. In the block which controls the ghost effect, add a wait time so that the total time that the clone is alive is equal to the ghost duration. 4. Add code to detect the up arrow and down arrow. When the up arrow is pressed, increase the ghost duration by .05. When the down arrow is pressed, decrease the ghost duration by .05. Make sure the duration is never less than or equal to zero!
