Adding colors to BrickColor.new()?

for i, v in pairs(children) do
	while blocks >= 1 do
	block = children[math.random(1,30)]
	block.BrickColor = BrickColor.new(0 + math.random(10,20),0,0)
	wait(0.5)
	end
end

I want to actually make it so each time this code randomly selects a block it becomes more red, as in it adds more red to the previous BrickColor value. Is this possible?

You can lerp the block's color with a for i = 1, 2 do loop.

--color1 will be the starting color, color2 finish color
local Color1, Color2 = BrickColor.new("Bright red").Color, BrickColor.new("Really red").Color

function LERP()
	for i = 0, .35, .01 do 
		block.Color = block.Color:lerp(Color1, i)
		wait()
	end

	for i = 0, .35, .01 do 
		block.Color = block.Color:lerp(Color2, i)
		wait()
	end
	LERP() --loops the function
end

LERP()

0 + math.random(10,20),0,0 will give you (10 to 20,0,0) every time, not slowly increase it.

If you want to increase each loop, I suggest using the Color property, and slowly adding to the r property of Color3

red = block.Color.r
block.Color = Color3.fromRGB(red + math.random(10,20),0,0)