1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | INPUT r INPUT a, b SCREEN 7 , , 0 , 1 x = a y = a sx = 8 sy = 5 WHILE INKEY$ = "" PCOPY 0 , 1 CIRCLE (x, y), r, 0 PAINT (x, y), 0 x = x + sx y = y + sy CIRCLE (x, y), r, 15 PAINT (x, y), 15 IF y > b OR y < a THEN sy = -sy: sx = -sx t = TIMER WHILE t = TIMER WEND WEND |