賽車教程

setBackdrop("road.png");

var car = createSprite("car.png");

var a = 0;

forever(function() {

});

forever(function() {

car.stepForward(a);

if (key.right) {

car.direction += 1;

}

if (key.left) {

car.direction -= 1;

}

if (key.up) {

a = a+0.01;

}

if (key.down) {

a = a-0.01;

});