Returns a table with a given number of frames positioned on a scale from 0 to 1 along a given dimension in a way where they all fit with equal spacing in between them, aligned to a given end of the dimension.

getInterequidistantlyScaledFrames.lua

function getInterequidistantlyScaledFrames( count, padding, dimension, alignment )
	-- Returns a table containing `count` Frame objects with `padding`
	-- percent of the frame size (on a scale from 0 to 1) of spacing in
	-- between each frame in the "x" or "y" `dimension`, aligned to the
	-- "left", "center", or "right" (or, along the y-axis, "top",
	-- "center", or "bottom")
	
	local frames = {};
	
	-- Calculate the size of each frame considering the padding in
	-- between each one (so that all the frames fit)
	local frame_size = 1 / ( count + ( padding * count ) );
	
	for frame_number = 1, count do

		-- Calculate the position of each frame
		local frame_position = 1 / count * ( frame_number - 1 );
		local last_frame_position = 1 / count * ( frame_number - 2 );
	
		if alignment == "center" then
			frame_position = frame_position + ( ( frame_position - ( last_frame_position + frame_size ) ) / 2 );
		elseif alignment == "right" or alignment == "bottom" then
			frame_position = frame_position + ( frame_position - ( last_frame_position + frame_size ) );
		end;
	
		-- Create frame `frame_number`
		local Frame = Instance.new( "Frame" );
		Frame.Size = UDim2.new( dimension == "x" and frame_size or 0, 0, dimension == "y" and frame_size or 0, 0 );
		Frame.Position = UDim2.new( dimension == "x" and frame_position or 0, 0, dimension == "y" and frame_position or 0 );

		-- Place frame `frame_number` in its appropriate position in the table
		frames[frame_number] = Frame;
		
	end;
	
	-- Return the table of frames
	return frames;

end;

A few examples of the kind of stuff that this is useful for:

local frames = getInterequidistantlyScaledFrames( 6, 0.5, "x", "center" );

local DemoGUI = Instance.new( "ScreenGui", Game:GetService( "StarterGui" ) );
for frame_number, Frame in pairs( frames ) do
    Frame.Position = Frame.Position + UDim2.new( 0, 0, 0.4, 0 );
    Frame.Size = Frame.Size + UDim2.new( 0, 0, 0.2, 0 );
    Frame.Parent = DemoGUI;
end;

---

local frames = getInterequidistantlyScaledFrames( 6, 1, "x", "center" );

local DemoGUI = Instance.new( "ScreenGui", Game:GetService( "StarterGui" ) );
for frame_number, Frame in pairs( frames ) do
    Frame.Position = Frame.Position + UDim2.new( 0, 0, 0.4, 0 );
    Frame.Size = Frame.Size + UDim2.new( 0, 0, 0.2, 0 );
    Frame.Parent = DemoGUI;
end;

---

local frames = getInterequidistantlyScaledFrames( 6, 1, "y", "center" );

local DemoGUI = Instance.new( "ScreenGui", Game:GetService( "StarterGui" ) );
for frame_number, Frame in pairs( frames ) do
    Frame.Position = Frame.Position + UDim2.new( 0.4, 0, 0, 0 );
    Frame.Size = Frame.Size + UDim2.new( 0.2, 0, 0, 0 );
    Frame.Parent = DemoGUI;
end;

---

local frames = getInterequidistantlyScaledFrames( 6, 2, "x", "right" );

local DemoGUI = Instance.new( "ScreenGui", Game:GetService( "StarterGui" ) );
for frame_number, Frame in pairs( frames ) do
    Frame.Position = Frame.Position + UDim2.new( 0, 0, 0.4, 0 );
    Frame.Size = Frame.Size + UDim2.new( 0, 0, 0.2, 0 );
    Frame.Parent = DemoGUI;
end;