Monitor Color Flash

colorSeq = {
    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
}
delay = 1
periphs = peripheral.getNames()
monitorList = {}
for a = 1, #periphs do
    if peripheral.getType(periphs[a]) == "monitor" then
        table.insert(monitorList, periphs[a])
    end
end

while true do
    for a = 1, #colorSeq do
        for b = 1, #monitorList do
            mon = peripheral.wrap(monitorList[b])
            mon.setBackgroundColor(colorSeq[a])
            monX, monY = mon.getSize()
            for c = 1, monY do
                for d = 1, monX do
                    mon.setCursorPos(d,c)
                    write(" ")
                end
            end
        end
        sleep(delay)
    end
end