Footsteps

PImage img;
PImage img1;
void setup() {
size (700,1000);

}
void draw() {
if (mouseButton == LEFT)
{img1 = loadImage("left.png");
image(img1, 0, 200);}
else if (mouseButton == RIGHT)
{img = loadImage("right.png");
image(img,250,0);}
else {background(random(222),random(250),random(238));}
}