--I've tried this script :
B = game.Workspace.Part while true do B.BrickColor = BrickColor.new("Really red") wait(2) B.BrickColor = BrickColor.new("Really black") wait(2) end
I think you should user Color3 instead of BrickColor. I usually use Color3 instead of BrickColor
Color3 uses Red/Green/Blue values instead of color names.
Use the script with Color3:
B = game.Workspace.Part while true do B.BrickColor = Color3.new(255, 0, 0) -- makes the brick "Really red" wait(2) B.BrickColor = Color3.new(0, 0, 0) -- makes the brick "Really black" wait(2) end