变量
VELOCITY [Laser1]
active [Laser1]
active [Laser3]
active [Laser2]
random [Laser1]
random [Laser2]
random [Laser3]
firing [Robot2]
transparency [LaserDeath2]
counter [LaserDeath2]
COUNTER_MAX [LaserDeath2]
active [LaserDeath1]
active [LaserDeath2]
角色
Laser1
Robot2
Laser2
Laser3
Laser4
LaserDeath1
LaserDeath2
Laser5
