TL;DR Shell

local term = require("term")
local component = require("component")
local shell = component.shell
local gpu = component.gpu -- get primary gpu component
gpu.setResolution(80, 24)
local w = 80
local h = 24
--Color Setup
local aqua = 0x00FFFF
local black = 0x000000
local blue = 0x0000FF
local fuchsia = 0xFF00FF
local gray = 0x808080
local green = 0x008000
local lime = 0x00FF00
local maroon = 0x800000
local navy = 0x000080
local olive = 0x808000
local purple = 0x800080
local red = 0xFF0000
local silver = 0xC0C0C0
local teal = 0x008080
local white = 0xFFFFFF
local yellow = 0xFFFF00

function activedirectorystring()
    activedirectory = shell.getWorkingDirectory()
    activedirectory = strupper(activedirectory)
    if strlen(activedirectory) > 24
        activedirectory = string.sub(activedirectory, strlen(activedirectory) - 24, strlen(activedirectory))
    end
end

activedirectorystring()

--Initial Text Color
gpu.setForeground(white)

--Color Blocks
gpu.setBackground(blue)
gpu.fill(1, 1, w, h, " ") -- clears the screen
term.setCursor(1,2)
gpu.setBackground(teal)
gpu.fill(1, 2, w, 1, " ")
gpu.setBackground(white)
gpu.fill(1, 3, w, 3, " ")
gpu.setBackground(gray)
gpu.fill(1, 6, w, 1, " ")
gpu.setBackground(white)
gpu.fill(1, 7, w, 8, " ")
gpu.setBackground(gray)
gpu.fill(1, 15, w, 1, " ")
gpu.setBackground(white)
gpu.fill(1, 16, w, 8, " ")
gpu.setBackground(teal)
gpu.fill(1, 24, w, 1, " ")


--Text Blocks

--Title
term.setCursor(34,1)
gpu.setBackground(blue)
gpu.setForeground(white)
io.write("TLDR-ⓄⓈ 0.1a")

--Menu
gpu.setBackground(teal)
term.setCursor(4,2)
io.write("F")
gpu.setForeground(black)
io.write("ile  ")
gpu.setForeground(white)
io.write("O")
gpu.setForeground(black)
io.write("ptions  ")
gpu.setForeground(white)
io.write("V")
gpu.setForeground(black)
io.write("iew  ")
gpu.setForeground(white)
io.write("T")
gpu.setForeground(black)
io.write("ree  ")
gpu.setForeground(white)
io.write("H")
gpu.setForeground(black)
io.write("elp")
gpu.setForeground(white)

--Directory Tree
gpu.setBackground(gray)
gpu.setForeground(black)
term.setCursor(12,6)
io.write("Directory Tree")

--Active Directory
gpu.setBackground(gray)
gpu.setForeground(black)
term.setCursor(12,60-(string.len(activedirectory)/2))
io.write(activedirectory)

--Program List
gpu.setBackground(gray)
gpu.setForeground(black)
term.setCursor(35,15)
io.write("Programs")

gpu.setForeground(red)