Exercise 7.3 (Extra credit) Write a JavaScript program which will simulate turtle graphics. You will use two dimensional array to represent a floor of 20 x 20. The commands that you can give to the turtle is meaning Pen up Pen down Turn right Turn left Command 5, 12 Two commands means move forward 12 spaces. You can specify how many steps by change 12 to that value. For example 5, 3 means you enter 5 press the Print the 20 x 20 array End of data Your program will list the commands and their meaning. There are one textbox for user to enter command number, two buttons: one for send command, the other one for process the commands sent. The following shows the screen shot Exercise 7.3 (Extra credit) Write a JavaScript program which will simulate turtle graphics. You will use two dimensional array to represent a floor of 20 x 20. The commands that you can give to the turtle is meaning Pen up Pen down Turn right Turn left Command 5, 12 Two commands means move forward 12 spaces. You can specify how many steps by change 12 to that value. For example 5, 3 means you enter 5 press the Print the 20 x 20 array End of data Your program will list the commands and their meaning. There are one textbox for user to enter command number, two buttons: one for send command, the other one for process the commands sent. The following shows the screen shot