code: def cross(vec1, vec2):
          
          if isinstance(vec1, Vector3) and isinstance(vec2, Vector3):
              vec3 = Vector3()
              vec3.x = (vec1.y * vec2.z) - (vec1.z * vec2.y)
              vec3.y = (vec1.z * vec2.x) - (vec1.x * vec2.z)
              vec3.z = (vec1.x * vec2.y) - (vec1.y * vec2.x)
              return vec3
          else:
              raise TypeError("vec1 and vec2 must be Vector3's")
docs: Returns the cross product of two Vectors