LampControl

mount = function (peripheral_type)
    for _,location in pairs(peripheral.getNames()) do
        if peripheral.getType(location) == peripheral_type then
            return peripheral.wrap(location)
        end
    end
    return false
end

lamp = mount("modem")
hue = 0.00

function toHex(dec)
    return(string.format("%x",dec))
 end

function toDec(hex)
    return(tonumber(hex))
end
function hsvToRgb(h, s, v)
    local r, g, b
    local i = math.floor(h * 6);
    local f = h * 6 - i;
    local p = v * (1 - s);
    local q = v * (1 - f * s);
    local t = v * (1 - (1 - f) * s);
    i = i % 6
    if i == 0 then r, g, b = v, t, p
    elseif i == 1 then r, g, b = q, v, p
    elseif i == 2 then r, g, b = p, v, t
    elseif i == 3 then r, g, b = p, q, v
    elseif i == 4 then r, g, b = t, p, v
    elseif i == 5 then r, g, b = v, p, q
    end
    rHex = toHex(math.floor(r*255))
    gHex = toHex(math.floor(g*255))
    bHex = toHex(math.floor(b*255))
    if string.len(rHex) <= 1 then
       rHex = rHex..0
    end
    if string.len(gHex) <= 1 then
       gHex = gHex..0
    end
    if string.len(bHex) <= 1 then
       bHex = bHex..0
    end
    return("0x"..rHex..gHex..bHex)
end
function centerText(text)
    local x,y = term.getSize()
    term.setCursorPos(math.floor((x / 2) - (text:len() / 2)), y)
    write(text)
    end
while not stop do
    term.clear()
    centerText("Color in hex? ")
    color = read()
    term.clear()
    if color == "stop" then stop = true end
    if color == "rainbow" then
        while not true do
            for _,v in pairs(lamp.getNamesRemote()) do
                local hex = hsvToRgb(hue,1,1)
                local decimal = toDec(hex)
                lamp.callRemote(v,"setColor",decimal)
            end
            hue = hue+.01
            sleep(.005)
        end
    elseif color == "something" then
        print()
    else
        for _,v in pairs(lamp.getNamesRemote()) do
            lamp.callRemote(v,"setColor",tonumber(color))
        end
    end
end