your code
mothership(700,700);
shuttle(50,50,1000);
planet(600,300,"earth");
planet(400,50,"mars");
planet(450,400,"venus");
planet(200,400,"neptune");
planet(200,600,"mercury");
planet(600,600,"uranus");
fuel(200,50,300);
fuel(600,50,300);
fuel(300,300,300);
fuel(200,500,300);
fuel(400,600,300);