Perfect Square Patch

Create a function that takes an integer and outputs an n x n square solely consisting of the integer n.

Examples

square_patch(3) ➞ [
  [3, 3, 3],
  [3, 3, 3],
  [3, 3, 3]
]

square_patch(5) ➞ [
  [5, 5, 5, 5, 5],
  [5, 5, 5, 5, 5],
  [5, 5, 5, 5, 5],
  [5, 5, 5, 5, 5],
  [5, 5, 5, 5, 5]
]

square_patch(1) ➞ [
  [1]
]

square_patch(0) ➞ []

Notes

• n >= 0.
• If n == 0, return an empty list.