diff --git a/compost_control.lua b/compost_control.lua
index dc9b63f..cb700cb 100644
--- a/compost_control.lua
+++ b/compost_control.lua
@@ -7,7 +7,9 @@ local SOURCES =
 { ""
 }
 
-local COMPOST_INV = ""
+local COMPOST_INPUT = ""
+local COMPOST_OUTPUT = ""
+local STORAGE = ""
 
 local SLEEP_TIME = 40
 
@@ -27,17 +29,18 @@ function compare_counts (count1, count2)
             diffs[item] = count - count2[item]
         end
     end
+    return diffs
 end
 
 function compost (src, item_name, amount)
-    if amount < 1 return end
+    if amount < 1 then return end
     local amount_moved = 0
     -- 1. scan through inventory until {item} is found
-    for slot, item in pairs(src.list())
+    for slot, item in pairs(peripheral.call(src, "list")) do
         if item.name == item_name then
             -- 2. move up to {amount} to compost, recording amount moved
             amount_moved = peripheral.call(
-                COMPOST_INV, "pullItems", src, slot, amount
+                COMPOST_INPUT, "pullItems", src, slot, amount
             )
             break
         end
@@ -46,7 +49,14 @@ function compost (src, item_name, amount)
     return compost(src, item_name, amount - amount_moved)
 end
 
+function move_all (src, dest)
+    for slot, item in pairs(peripheral.call(src, "list")) do
+        peripheral.call(src, "pushItems", dest, slot)
+    end
+end
+
 while true do
+    move_all(COMPOST_OUTPUT, STORAGE)
     for _, source in ipairs(SOURCES) do
         local totals = tally_up(source)
         local diffs = compare_counts(totals, CHECKS)