Help with an enemy's AI Script

1) If you want to build up a cycle of attack packs, then what you want to do is command wait until next action and reset target; (something similar should be description)

2) If you want to evolve the AI of the boss through the battle, then you should use a variable between 0 and 3(0,1,2,3) and use it for count his phases and check which actions to use according to the current value of the variable;

3) If it's just a starting battle set of action, then you should still use a variable, but it's better to use one of the 8 bits of that var(bits 0,1,2,3,4,5,6,7)
WARNING: never use as counter a variable which uses bits, those have to be used as 8 flag slots, and adding/subtracting numbers to it will make them swap in a totally umpredictable way.