Enemy Behaviour

A few days ago I began work on how the enemy will react to the player. (Currently, if it can see the player; it gets startled, indicated by an exclamation point above it's head.)

Today I will begin work on making the enemy patrol an area and when it sees the player move towards them.
If it loses sight of the player, It will go over and investigate the place that it last saw them then if it didn't find them, it will return to it's patrol.
This should overall be fairly simple to program, fingers crossed.