There are a few ways to make flashing lights in Minecraft Xbox 360. The first way is to use the command “net.minecraft.world.display_name” to get a name for a block that will turn on and off when hit with a fire or light source. The second way is to use the command “net.minecraft.world.item.ItemBlockFlashingLight” to create an ItemBlock that will turn on and off when hit with a fire or light source. The third way is to use the command “net.minecraft.world.item.ItemBlockFlashingLighting” to create an ItemBlock that will turn on and off when hit with both fire and light sources at the same time, like in a torch or light stick!