simple turtle attack with back signal enable

local atk=false
local cycle=0
local function dump()
for i=1,16 do
if(turtle.getItemCount(i)>0) then
turtle.select(i)
turtle.drop()
end
end
turtle.select(1)
end

while true do
if redstone.getInput("back") then
	if not atk then
	print("attacking")
	atk=true
	end
for i=1,4 do turtle.attack() end
cycle=cycle+1;
cycle=cycle%8
if(cycle ==0) then dump() end

else
if(atk) then
print("sleeping")
dump()
atk=false
end
end
sleep(1)
end