How to make a aggressive mob spawn at day!

So normally you not able to spawn a aggressive mob at day, and if you forced the game will crash, so if want to create a mob to spawn at day you will need to create the mob you want to spawn X and another mob Y

The X mob can be whatever you want, and the Y would be a living entity that have one pixel of texture, the mob can be biped or anything else, you need to create a procedure on entity live tick, the procedure goes like:

Spawn X entity at X: X Y: Y Z: Z,

Respawn source entity.

And make the Y mob spawning how you want.

Done!