The sensor of a mouse connected to the computer or the touch pad being touched and swiped around on
for num in range(4):
print(num)
The output will be:
0
1
2
3
The for loop iterates through the numbers in the range function and prints those same numbers to the console.
Here are the steps I would do:
Do a "hard" power off. Hold the power key until the screen turns off. Wait 10 seconds. Turn it on. If it still shows the screen... then i'm not sure.
The error is occurring because it has nothing to boot off of. It's probably something wrong with your hardware. The instructions say for you to insert a "boot disk" and press any key.