*Click green flag to start. *Use your mouse pointer. *Press the spacebar to clear everything. *Press the right arrow key to stop everything. *Press the up arrow key to change to random position. *Press the down arrow to change the backdrop. *Press the p key to switch back to the first backdrop.
Got the idea from @Mhiller with the mouse pointer thing. 18th project! Lot's of projects that I have released on scratch and I am so happy:)!