Simple State Machine

//Simple State Machine
switch(State)
{
    case Idle:
        //Idle in place
        if(Wait) {Wait -= 1;} else
        {
            //Move to a random location
            TargetX = irandom(room_width);
            TargetY = irandom(room_height);
            State = Moving;
        }
    break;

    case Moving:
        //We're vertical with target location
        if(TargetX = x)
        {
            //We're horizontal with target location
            if(TargetY = y)
            {
                //Stand in place for a few seconds
                Wait = 120 + irandom(120);
                State = Idle;
            }
            else
            {
                //Move horizontal towards target
                y += median(-Speed, (TargetY - y), Speed);
            }
        }
        else
        {
            //Move vertical towards target
            x += median(-Speed, (TargetX - x), Speed);
            //--//
            if(TargetY != y)
            {
                //Move diagonal towards target
                y += median(-Speed, (TargetY - y), Speed);
            }
        }
    break;
}