local invslot = 2
while true do
    if turtle.detectDown() == true then -- if there is a block below, it will do this
        for i=1, invslot do -- switches through the slots between 1 and 2
                        turtle.select(i)
                        if turtle.compare() == true then -- if the desired block is infront
                           if i == 1
                                turtle.dig()
                                turtle.forward()
                                turtle.digUp()
                                turtle.up()
                                turtle.digUp()
                                turtle.up()
                                turtle.digUp()
                                turtle.up()
                                turtle.digUp()
                                turtle.up()
                                turtle.down()
                                turtle.down()
                                turtle.down()
                                turtle.down()
                           else if i == 2 then
                                turtle.dig()
                                turtle.forward()
                                print("Got into the 2nd i!")
                          else
                                print ("i:"..i)
            end
                    end
                end
            if turtle.compare() == false then -- if the block infront is NOT the desired block
                while turtle.compare() == false and turtle.detectDown() == true do -- while the block infront is not a desired block AND there is a block underneath
                    turtle.forward()
                    if turtle.detect() == true then -- if it detects a block infront of it
                        turtle.turnLeft()
                        turtle.forward()
                    else
                        turtle.forward()
                    end
                end
            end
    else
    end
end