Enemy movement

What's the best way to make every single instance of a sprite do an action when the main character is near that sprite?

Simply having:

Character x < Enemy.x + 100

Character x > Enemy.x - 100

----------------set Enemy X to Enemy.x + 1

would make every instance of Enemy move if the Character is 100 pixels in front or behind of the first Enemy added to the layout.

It doesn't check the conditions for every instance of Enemy individually.

Invert your logic.

Instead of comparing character.X, compare Enemy.X

Enemy.X >= Character.X - 100

Enemy.X <= Character.X + 100

=> enemy.Move forward 1 PX

The enemy will go to the right (if its angle is 0) if the character gets anywhere the 100 pixels range area around it.

And it applies to all instances of enemy.

A new question appears: why didn't I try this before?

Thanks.