Modify a text file: $/x210bam_bounce.pde
$/x210bam_bounce.pde
///Below is a global declaration float xDog,yDog, xSpeedDog=5, ySpeedDog=-2; void setup() { size(700,620); xDog=random(30,70); yDog=100; } void draw() { background(25,2,255); rect(xDog,yDog, 50,150); xDog=xDog + xSpeedDog; yDog=yDog + ySpeedDog; if (xDog > width) { xSpeedDog = - xSpeedDog; } if (xDog <0) { xSpeedDog = - xSpeedDog; } if (yDog < 50 ) { ySpeedDog = - ySpeedDog; } if (yDog > height-50 ) { ySpeedDog = - ySpeedDog; } }