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alien a1;
alien a2;
alien a3;
void setup(){
size(500,500);
color(HSB,360,100,100);
a1= new alien(250,250,0); //xpos,ypos,color
a2= new alien(250,200,180);
a3= new alien(100,50,330);
}
void draw(){
a1.display();
a1.move();
a2 display;
a2.move();
a3 display;
a3.move();
}