raresign

local colorsList = {
    colors.white, colors.orange, colors.magenta, colors.lightBlue,
    colors.yellow, colors.lime, colors.pink, colors.gray,
    colors.lightGray, colors.cyan, colors.purple, colors.blue,
    colors.brown, colors.green, colors.red, colors.black,
}

local message = [[
       __
      / /  ___  __ _____  ___ ____
     / /__/ _ \/ // / _ \/ _ `/ -_)
    /____/\___/\_,_/_//_/\_, /\__/
                        /___/
]]

local monitor = peripheral.find("monitor")
monitor.setTextScale(1)
monitor.setCursorBlink(false)
local currentTextColor = colors.green -- Default text color
local currentBackgroundColor = colors.black -- Default background color
monitor.setTextColor(currentTextColor) -- Default text color
monitor.setBackgroundColor(currentBackgroundColor) -- Default background color

local totalWidth, height = monitor.getSize()
local singleMonitorWidth = totalWidth / 6 -- Adapt for 6-wide monitors
local speed = 0.25 -- Default speed
local isPaused = false
local offset = 1
local isRainbowMode = false
local currentColorIndex = 1

local messageLines = {}
for line in message:gmatch("[^\r\n]+") do
    table.insert(messageLines, line .. string.rep(" ", totalWidth))
end

local fullMessageWidth = totalWidth
for _, line in ipairs(messageLines) do
    fullMessageWidth = math.max(fullMessageWidth, #line)
end

fullMessageWidth = fullMessageWidth + totalWidth

local function drawText(offset)
    monitor.setBackgroundColor(currentBackgroundColor)
    monitor.clear()
    if isRainbowMode then
        currentColorIndex = (currentColorIndex % #colorsList) + 1
        monitor.setTextColor(colorsList[currentColorIndex])
    else
        monitor.setTextColor(currentTextColor) -- Use variable here
    end
    for i = 1, #messageLines do
        local lineOffset = (offset - 1) % fullMessageWidth + 1
        local visibleText = messageLines[i]:sub(lineOffset, lineOffset + totalWidth - 1) ..
                            messageLines[i]:sub(1, lineOffset - 1)
        monitor.setCursorPos(1, i)
        monitor.write(visibleText)
    end
end

local function scrollText()
    while true do
        if not isPaused then
            drawText(offset)
            sleep(speed)
            offset = offset + 1
            if offset > fullMessageWidth then
                offset = 1
            end
        else
            sleep(0.1)
        end
    end
end

local function terminalInterface()
    local helpMessage = [[
Commands:
  speed <value>            - Set scrolling speed (0.1 to 1)
  pause                    - Pause scrolling
  start                    - Start scrolling
  center                   - Center and pause scrolling
  textcolor <color>        - Change text color (e.g., green, red, blue)
  backgroundcolor <color>  - Change background color
  rainbow                  - Enable rainbow mode
  help                     - Show this help message
]]

    print("Welcome to the ASCII Scroller Control Terminal")
    print("Waiting for command. Type 'help' for a list of commands.")
    print(helpMessage)
    while true do
        local command = read()
        if command == "pause" then
            isPaused = true
        elseif command == "start" then
            isPaused = false
        elseif command == "center" then
            isPaused = true
            offset = math.floor((totalWidth - #message) / 2)
        elseif command == "rainbow" then
            isRainbowMode = not isRainbowMode
            print(isRainbowMode and "Rainbow mode enabled!" or "Rainbow mode disabled!")
        elseif command == "help" then
            print(helpMessage)
        elseif command:match("^speed%s+(%S+)$") then
            local newSpeed = tonumber(command:match("^speed%s+(%S+)$"))
            if newSpeed and newSpeed >= 0.1 and newSpeed <= 1 then
                speed = newSpeed
                print("Speed updated!")
            else
                print("Invalid input. Please enter a number between 0.1 and 1.")
            end
        elseif command:match("^textcolor%s+%w+$") then
            local colorName = command:match("^textcolor%s+(%w+)$")
            if colors[colorName] then
                currentTextColor = colors[colorName] -- Update variable here
                print("Text color updated!")
            else
                print("Invalid color. Available colors: white, orange, magenta, etc.")
            end
        elseif command:match("^backgroundcolor%s+%w+$") then
            local colorName = command:match("^backgroundcolor%s+(%w+)$")
            if colors[colorName] then
                currentBackgroundColor = colors[colorName]
                print("Background color updated!")
            else
                print("Invalid color. Available colors: white, orange, magenta, etc.")
            end
        else
            print("Unknown command. Type 'help' for a list of commands.")
        end
    end
end

parallel.waitForAll(scrollText, terminalInterface)