IFE 热身任务step4

可以吃掉三个星星

ball.at(82,46,ball=>ball.turnRight());
ball.at(82,126,ball=>ball.turnLeft());
ball.at(270,126,ball=>ball.turnLeft());
ball.at(270,46,ball=>ball.turnRight());
ball.at(370,46,ball=>ball.turnRight());
ball.at(370,100,ball=>ball.turnLeft());
ball.at(470,100,ball=>ball.turnLeft());
ball.at(470,10,ball=>ball.turnRight());
ball.at(550,10,ball=>ball.turnRight());
ball.at(550,100,ball=>ball.turnLeft());
ball.at(630,100,ball=>ball.turnRight());
ball.at(630,190,ball=>ball.turnRight());
ball.at(570,190,ball=>ball.turnLeft());
ball.at(570,475,ball=>ball.turnLeft());