diff --git a/auto.sh b/auto.sh
deleted file mode 100755
index f4bf9ac..0000000
--- a/auto.sh
+++ /dev/null
@@ -1,35 +0,0 @@
-#!/usr/bin/env bash
-
-B="\033[0;1m"
-G="\033[0;92m"
-R="\033[0m"
-
-echo -e "${B}${G}Let's make some hash${R}"
-
-echo -e "\n${B}${G}  - cleanup environment${R}"
-echo -e "remove files: small.hash, large.hash, large.txt"
-docker exec -it hash-demo sh -c "rm -rf small.hash"
-docker exec -it hash-demo sh -c "rm -rf large.hash"
-docker exec -it hash-demo sh -c "rm -rf large.txt"
-
-echo -e "\n${B}${G}  - make large file (concat small files)${R}"
-for i in $(seq -f "%02g" 10)
-do
-    echo "  #> cat $i.txt >> large.txt"
-    docker exec -it hash-demo sh -c "cat $i.txt >> large.txt"
-done
-
-echo -e "\n${B}${G}  - make hash of small files${R}"
-for i in $(seq -f "%02g" 10)
-do
-    echo -e "  #> homo -file $i.txt | tee -a small.hash"
-    docker exec -it hash-demo sh -c "homo -file $i.txt | tee -a small.hash"
-done
-
-echo -e "\n${B}${G}  - make hash of large${R}"
-echo -e "  #> homo -file large.txt | homo -concat"
-docker exec -it hash-demo sh -c 'homo -file large.txt | homo -concat'
-
-echo -e "\n${B}${G}  - make hash of pieces${R}"
-echo -e "  #> cat small.hash | homo -concat"
-docker exec -it hash-demo sh -c 'cat small.hash | homo -concat '
\ No newline at end of file
diff --git a/benchmark b/benchmark.sh
similarity index 76%
rename from benchmark
rename to benchmark.sh
index 6c9347d..3d16e40 100755
--- a/benchmark
+++ b/benchmark.sh
@@ -5,10 +5,8 @@ OUT="${OUT:-$(mktemp /tmp/random-file.XXXXXX)}"
 
 dd if=/dev/urandom of="$OUT" bs="$BLOCK_SIZE" count=1
 
-go build ./cmd/tzsum || exit 1
-
 for impl in avx avx2 generic; do
 	echo $impl implementation:
-	time ./tzsum -name "$OUT" -impl $impl
+	time ./bin/tzsum -name "$OUT" -impl $impl
 	echo
 done
diff --git a/demo.sh b/demo.sh
new file mode 100755
index 0000000..5537785
--- /dev/null
+++ b/demo.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+#set -x
+
+BLOCK_SIZE=${1:-100M} # 100Mb by default
+TMPDIR="${TMPDIR:-$(mktemp -d)}"
+
+OUT="${OUT:-"${TMPDIR}/bighash"}"
+
+echo "Preparing big file at ${OUT}..."
+dd if=/dev/urandom of="$OUT" bs="$BLOCK_SIZE" count=1
+
+echo "Make 4 smaller parts from ${OUT}..."
+split -dn 4 "${OUT}" "${TMPDIR}/"
+
+echo -n "Big file hash: "
+TZALL=$(./bin/tzsum -impl avx2 -name "${OUT}" | awk '{print $1}')
+echo "${TZALL}"
+
+for i in $(seq -f "%02g" 0 3)
+do
+  echo -n "Part ${i} hash:  "
+  PART=$(./bin/tzsum -impl avx2 -name "${TMPDIR}/${i}" | awk '{print $1}')
+  echo "${PART}" | tee -a "${TMPDIR}/part.hashes"
+done
+
+echo -n "Cumulative:    "
+TZCUM=$(./bin/homo -concat -file "${TMPDIR}/part.hashes")
+echo "${TZCUM}"
+
+if [[ "$TZCUM" == "$TZALL" ]]; then
+    echo "Original and cumulative hashes are equal!"
+else
+    echo "Original and cumulative hashes are NOT equal!"
+fi
+
+echo -ne "Cleaning up .. "
+rm -rf "${TMPDIR}"
+echo "Done!"