Thanks EVERYONE . It doesn't flash nearly as bad as it use to, I've just got to stop spinning or moving too frequently, but I've learned to live with it.
Whenever I load a lot or Load any neighborhood the ground flashes and or it turns black. I just bought a new computer to ensure that the specs were compatible with the Sims and all of the expansion packs. Does anyone know what I could do to fix it? Everything else works fine in the game it's just this problem I'm having.