Objective: Make it so once phase one begins our boss moves back and forth in the screen and begins firing.
Step 1: Make a coroutine to handle this stages movement
Step 2: Move the AttackOne Routine and this new routine to the StageOne method
Step 3: Create a bool to check that stage one has begun and put it in the update for when we are at the end position. This is to avoid calling the routines over and over.
Step 4: Setup new variables to handle the direction/position of our boss and put that in update so we can always know our position
Step 5: Create the logic in the new routine to control the movement of the boss and also set a new speed here.