laser scaner

l = peripheral.wrap("left")
while true do
 sleep(4)
 x, y, z, blockID, blockMeta, blockResistance = l.getFirstHit()
 if (x ~= -1) and (blockResistance ~= -1) then
   print ("Hit: (" .. x .. "; " .. y .. "; " .. z .. ") ID: " .. blockID .. ". Resistance: " .. blockResistance)
 else
   print ("No hits.")
 end
end