Computercraft Drill

-- pastebin get F0FLgqPs drill
-- pastebin run F0FLgqPs
function dig()
    return turtle.dig()
end

local drill=true
local depth=0
while drill do
    temp, data = turtle.inspectDown()
    if data.name == "minecraft:bedrock" then
        for i=0,depth-1 do turtle.up() end
        drill = false
        for k=1,16 do
            turtle.select(k)
            turtle.drop()
        end
    else
        turtle.digDown()
        turtle.down()
        depth = depth + 1
        for j=1,4 do
            temp, block = turtle.inspect()
            if block.name == "minecraft:obsidian" then dig()
            elseif block.name == "minecraft:diamond_ore" then dig()
            elseif block.name == "minecraft:diamond_block" then dig()
            elseif block.name == "minecraft:redstone_ore" then dig()
            elseif block.name == "minecraft:lit_redstone_ore" then dig()
            elseif block.name == "minecraft:emerald_ore" then dig()
            elseif block.name == "minecraft:emerald_block" then dig()
            elseif block.name == "minecraft:gold_ore" then dig()
            elseif block.name == "minecraft:iron_ore" then dig()
            elseif block.name == "minecraft:coal_ore" then dig()
            elseif block.name == "minecraft:redstone_block" then dig()
            elseif block.name == "minecraft:quartz_ore" then dig()
            elseif block.name == "minecraft:quartz_block" then dig()
            elseif block.name == "minecraft:diamond_block" then dig()
            elseif block.name == "BiomesOPlenty:gemOre" then dig()
            elseif block.name == "IC2:blockOreCopper" then dig()
            elseif block.name == "IC2:blockOreTin" then dig()
            elseif block.name == "IC2:blockOreUran" then dig()
            elseif block.name == "IC2:blockOreLead" then dig()
            elseif block.name == "TConstruct:SeardBrick" then dig()
            elseif block.name == "TConstruct:GravelOre" then dig()
            elseif block.name == "UndergroundBiomes:igneous_oreRedstone" then dig()
            elseif block.name == "UndergroundBiomes:metamorphic_oreRedstone" then dig()
            elseif block.name == "UndergroundBiomes:sedimentary_oreRedstone" then dig()
            elseif block.name == "UndergroundBiomes:igneous_oreCoal" then dig()
            elseif block.name == "UndergroundBiomes:metamorphic_oreCoal" then dig()
            elseif block.name == "UndergroundBiomes:sedimentary_oreCoal" then dig()
            elseif block.name == "UndergroundBiomes:igneous_oreDiamond" then dig()
            elseif block.name == "UndergroundBiomes:metamorphic_oreDiamond" then dig()
            elseif block.name == "UndergroundBiomes:sedimentary_oreDiamond" then dig()
            elseif block.name == "UndergroundBiomes:igneous_oreLapis" then dig()
            elseif block.name == "UndergroundBiomes:metamorphic_oreLapis" then dig()
            elseif block.name == "UndergroundBiomes:sedimentary_oreLapis" then dig()
            elseif block.name == "UndergroundBiomes:igneous_oreEmerald" then dig()
            elseif block.name == "UndergroundBiomes:metamorphic_oreEmerald" then dig()
            elseif block.name == "UndergroundBiomes:sedimentary_oreEmerald" then dig()
            elseif block.name == "UndergroundBiomes:igneous_oreGold" then dig()
            elseif block.name == "UndergroundBiomes:metamorphic_oreGold" then dig()
            elseif block.name == "UndergroundBiomes:sedimentary_oreGold" then dig()
            elseif block.name == "UndergroundBiomes:igneous_oreIron" then dig()
            elseif block.name == "UndergroundBiomes:metamorphic_oreIron" then dig()
            elseif block.name == "UndergroundBiomes:sedimentary_oreIron" then dig()
            elseif block.name == "harvestcraft:salt" then dig()
            end
            turtle.turnLeft()
        end
    end
end