input: Write a python function to create a list of squares of even numbers from a given list.
  assert create_even_squares([2, 3, 4, 5, 6])==[4, 16, 36]
  assert create_even_squares([1, 2, 3, 4, 5, 6, 7, 8])==[4, 16, 36, 64]
  assert create_even_squares([10, 15, 20, 25])==[100, 400]
output: def create_even_squares(lst):
      return [x**2 for x in lst if x % 2 == 0]