Samuel can't sleep

We have a problem in our house. Owen can't fall asleep unless he has light, Samuel can't fall asleep unless it is totally dark, and neither one of  them wants to have a room all their own. The street light right outside their window shines in pretty bright, and Owen likes to open the curtains so he can let the light in, but this makes Samuel very angry. So one morning when I came in to wake them up, Samuel had tried to block out the light coming in the window, by piling all the blankets and stuffed animals in the room in a pile.