Landmark mining turtle

local modem = peripheral.wrap("right")
modem.open(6421)
local function transmit(msg)
    modem.transmit(6421,6421,msg)
end

while true do
    local nvm,nvm2,sChannel,rChannel,msg,nvm3=os.pullEvent("modem_message")
    if(sChannel==6421 and msg=="break_and_placemark") then
        if(turtle.detect()==true) then
            turtle.dig()
            sleep(1)
            turtle.place()
            sleep(1)
            turtle.back()
            sleep(5)
            turtle.forward()
            turtle.suck()
            sleep(15)
            turtle.suck()
        elseif(turtle.detect()==false) then
            turtle.place()
            sleep(0.6)
            turtle.back()
            sleep(5)
            turtle.forward()
            turtle.suck()
            sleep(15)
            turtle.suck()
        end
    end
end