length = 0
count = 0
Abstand = 0

args = {...}

if args[1] == "0" or args[1] == nil then

        print("Korrektes Format lautet: Programmname <Ganglaenge> <Anzahl Abzweigungen> <Abstand Gänge> " )
        print("Ebefalls moeglich: Programmname <Ganglaenge>")
        print("Nix zu tun, fahre herunter !")
        return(0)

else

        length = args[1]+0 -- bugfixes string

end



if args[2] == "0" or args[2] == nil then

        count = 0

else

        count = args[2]+0

end

if args[3] == "0" && args [2] == "0" or args[3] == nil && args [2] == "0" then

        count = 0

else

        count = args[2]+0

end

print("Fuehre aus: Zonkotron Miner V 0.2")
print("Loescher Boehren!")
print("Laenge:".. length)
print("count:" .. count)




function turn()         -- Turns 180

        turtle.turnRight()
        turtle.turnRight()

end




function lDig(x)  -- Digs a tunnel 2 spaces below cleared room

        for i=1,x,1 do

                if turtle.detect() then
                turtle.dig()
                end

        turtle.forward()

                if turtle.detectDown() then
                turtle.digDown()
                end


        end

end



function tDig(x)  -- Digs a tunnel 3 label set ZONK

        for i=1,x,1 do

                while turtle.detect() do

                	turtle.dig()
                	sleep(0.5)

                end

 	        turtle.forward()

                if turtle.detectDown() then

                	turtle.digDown()
                end

                while turtle.detectUp() do

               		turtle.digUp()
                	sleep(0.5)
                end

     	end

end




function sDig(y) -- Digs in a straight line

	for i=1,y,1 do

	if turtle.detect() then

		turtle.dig()

	end

	turtle.forward()

	end

end






function uDig(x)  -- Digs an upper 2 high clearance tunnel

        for i=1,x,1 do

                while turtle.detect() do
                turtle.dig()
                sleep(0.5)
                end

                if turtle.detectDown() then
                turtle.digDown()
                end

        turtle.forward()

        end
end





-- Start Hauptprogramm


if count == nil or count == 0 then

        for i=1,3,1 do

                while turtle.detectUp() do

                        turtle.digUp()
                        sleep(0.5)

                end

        	turtle.up()
        end

        uDig(length)
        turn()

        	for i=1,2,1 do

                	if turtle.detectDown() then

                		turtle.digDown()

                	end

        		turtle.down()

        	end

        	if turtle.detectDown() then

        		turtle.digDown()

        	end

        	lDig(length)
        	turtle.down()
        	turn()


else
        for i=1,count,1 do

        	turtle.turnRight()

        	for i=1,3,1 do

                	while turtle.detectUp() do

                        	turtle.digUp()
                        	sleep(0.5)
                	end

        	turtle.up()

        	end

        	uDig(length)
        	turn()

       		for i=1,2,1 do

                	if turtle.detectDown() then

                		turtle.digDown()
                	end

        		turtle.down()
        	end

        	if turtle.detectDown() then

                	turtle.digDown()
        	end

        	lDig(length)
        	turtle.down()
        	turtle.turnRight()

        	for i=1,3,1 do

        		turtle.forward()

                	if turtle.detect() then

                		print("Tunnel End,Aborting Branch process")
                		return(0)

                	end
        	end

        end

end
print("Finished!")