For i,v color change help?

I tried something that I thought would save time, but it doesnt work, help?

local play = game.Workspace.Test

for i,v in pairs(play:GetChildren()) do
	if v.BrickColor == ("Really black") then
	v.BrickColor = BrickColor.new("Institutional white")
	wait()
end

Your problem was you're missing an end. The if keyword opens a new scope, which needs to be closed with an end.

local play = game.Workspace.Test


for i,v in pairs(play:GetChildren()) do
	if v.BrickColor == ("Really black") then
		v.BrickColor = BrickColor.new("Institutional white")
		wait()
	end
end

local play = game.Workspace.Test

for i,v in pairs(play:GetChildren()) do
    if v.BrickColor == BrickColor.new("Really black") then
    v.BrickColor = BrickColor.new("Institutional white")
    wait()
end

In order to fix this you may need to figure out what white is in rgb. (Reb, blue, green)

local play = game.Workspace.Test

for i,v in pairs(play:GetChildren()) do
    if v.BrickColor == ("Really black") then
    v.BrickColor = BrickColor.new(255,255,255) --This should be white
    wait()
end

This should work with what you are trying to do. In rgb, 255 is the highest value and 0 is the lowest. If you made all the values into "0" you would end up getting black.