Ok, I've found another problem, The coin spawn code and the enemy code won't work together. The coin spawning works, but the enemy won't move.
ON TIMER 10
mytimer = mytimer + 1
IF mytimer > 3 THEN mytimer = 1
IF mytimer = 1 THEN
ai = RANDOM 1 2 3 4
IF ai = 1 THEN x1 = x1 + 50
IF ai = 2 THEN x1 = x1 - 50
IF ai = 3 THEN y1 = y1 + 50
IF ai = 4 THEN y1 = y1 - 50
SPRITE 3 x1 y1 block2.gif
END IF
END TIMER
ON TIMER 100
mytimer2 = mytimer2 + 1
IF mytimer2 > 3 THEN mytimer2 = 1
IF mytimer2 = 1 THEN
csX = RANDOM 626
csY = RANDOM 327
SPRITE 4 csX csY coin.gif
END IF
END TIMER