To do the simulation, some students will have to be meteors. Give those students the flashlights and some guidelines as to how often and where they are to flash their meteors. The other students will observe the shower. Turn off the lights and close the curtains. You may want to talk about the adjustment of eyes to the dark.
Pupils dilate in the dark, they contract when exposed to light.
Pupils exposed to red light don't contract as much as pupils exposed to white light. This is why many note-taking astronomers use flashlights covered with red cellophane to see their notebooks. The red-colored lights helps to preserve their night vision as much as possible. Review your expectations for the simulation. Have your meteor students flash their meteors for the designated time.