diff --git a/biofuel-manager.lua b/biofuel-manager.lua
index 45ce77d..de23200 100644
--- a/biofuel-manager.lua
+++ b/biofuel-manager.lua
@@ -30,6 +30,7 @@ local order = {
         return ticker.requestFiltered(OIL_PKG, request)
     end,
     biomass = function (amt, ticker)
+        -- TODO make order_amt calculation less naive
         local order_amt = amt * 3
         local request = {
             _op = "any",
@@ -51,10 +52,12 @@ local order = {
                     ["minecraft:leaves"] = true,
                 } },
             }
+        }
         return ticker.requestFiltered(BIOMASS_PKG, request)
     end,
     biofuel = function (amt, ticker)
         -- TODO
+        amt = math.floor(amt / 125)
         local request = function ()
             local biomass = {
                 name = "createaddition:biomass",
@@ -70,6 +73,10 @@ local order = {
             }
             return biomass, sugar, cinder_flour
         end
+        local notEnoughMaterials = function ()
+            -- TODO
+            -- use ticker to test ( biomass >= 32, sugar >= 16, and cinder flour >= 16
+        end
         local make_order = function (amt_to_make, amt_made)
             if amt_to_make <= 0 then return amt_made end
             if notEnoughMaterials() then return amt_made end
@@ -79,6 +86,7 @@ local order = {
             amt_made = amt_made + count
             return make_order (amt_to_make, amt_made)
         end
+        return make_order (amt, 0)
     end,
 }
 
@@ -114,7 +122,7 @@ function run (requester, ticker)
     return run(requester, ticker)
 end
 
-if arg[1] == "run" then
+if arg ~= nil and arg[1] == "run" then
     local requester = peripheral.wrap(MAIN_REQUESTER)
     local ticker = peripheral.wrap(SUBNET_TICKER)
     run(requester, ticker)