import turtle

screen = turtle.Screen()

# this assures that the size of the screen will always be 400x400 ...
screen.setup(1366, 768)

# ... which is the same size as our image
# now set the background to our space image
screen.bgpic("space.gif")

# Or, set the shape of a turtle
screen.addshape("rocketship.gif")
turtle.shape("rocketship.gif")

move_speed = 10
turn_speed = 10

# these defs control the movement of our "turtle"
def forward():
  turtle.forward(move_speed)

def backward():
  turtle.backward(move_speed)

def left():
  turtle.left(turn_speed)

def right():
  turtle.right(turn_speed)

turtle.penup()
turtle.speed(0)
turtle.home()

# now associate the defs from above with certain keyboard events
screen.onkeypress(forward, "k")
screen.onkeypress(backward, "j")
screen.onkeypress(left, "h")
screen.onkeypress(right, "l")
screen.listen()

turtle.exitonclick()