40

float x =0;

float y =0;

float speedx = 2.6;

float speedy 1.2;

void setup(){

size(400,400);

stroke(0,55);

}

void draw(){

x += speedx;

if(x > width || x <0){

speedx = -speedx;

}

if(y > height || y <0){

speedy =- seedy;

}

}