The Sun does this and the Moon does that.
THE DANCE OF THE MOON AND THE SUN
The sun is an over-powerful dynamic motor that powers the life of planet earth.
Its light... the beacon that calls life from the ground up to stand tall among the trees.
The moon is the equally powerful dynamic motor that powers the horrors of the night.
Its light, eldritch and mystical, calls up the undead... to haunt those lives among those trees.