input: Write a python function to generate a list of numbers divisible by 4 within a given range.
  assert generate_divisible_by_four(0, 20) == [0, 4, 8, 12, 16, 20]
  assert generate_divisible_by_four(10, 30) == [12, 16, 20, 24, 28]
  assert generate_divisible_by_four(50, 100) == [52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92, 96, 100]
output: def generate_divisible_by_four(start, end):
      return [i for i in range(start, end + 1) if i % 4 == 0]