CHECKS
THE BOX'S MAIN HELP:
This function generates a checkered pattern.
FQs (input):
This must be a float. The default is 4. This control the number of checks.
FQt (input):
This must be a float. The default is 4. This control the number of checks.
S (input):
This must be a float. The default is s.
T (input):
This must be a float. The default is t.
OUT (output):
This function generates a checkered pattern.