int x,y;

void setup(){
size(300,300);
}

void loop(){
background(255,255,255);
rect(x,y,100,100);
}

void keyPressed(){

if(key==UP){
y=y-5;
}

if(key==DOWN){
y=y+5;
}

if(key==LEFT){
x=x-8;
}

if(key==RIGHT){
x=x+8;
}
}