Modify the seaplane world to make the turn events work more smoothly. To do this, we can change the form of each of the turn control events to While the arrow key is pressed instead of When the arrow key is typed, and change each turn's style to abruptly. You might also want to experiment with the turn at speed primitive method in place of the turn method.

Try to create a speed control for the seaplane world. This is a little harder than it looks. Here are some ideas:

a. Create an object variable for the seaplane called speed.

b. Set the initial value of the speed to zero.

c. Pass the speed variable as the amount parameter to the seaplane's movement method instead of a fixed amount.

d. Create two controlsone to increase the speed and one to decrease it. You can use a math expression to do this.