diff --git a/scripts/mac-linux/install b/scripts/mac-linux/install
index 38e3642..c332d3d 100755
--- a/scripts/mac-linux/install
+++ b/scripts/mac-linux/install
@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 
+#change to ccurrent directory
 cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
 cd ../..
 
+#run
 npm install
\ No newline at end of file
diff --git a/scripts/mac-linux/start b/scripts/mac-linux/start
index b85d758..d58c9ad 100755
--- a/scripts/mac-linux/start
+++ b/scripts/mac-linux/start
@@ -1,14 +1,40 @@
-#!/usr/bin/env bash
+#!/bin/bash
 
+#change to ccurrent directory
+cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
+cd ../..
+
+#colors
 C1='\033[1;37m'
 C2='\033[1;33m'
 NC='\033[0m'
 
-cd -- "$( dirname -- "${BASH_SOURCE[0]}" )"
-cd ../..
+#make log folder
+if [[ ! -d log ]]
+then
+    mkdir log
+fi
 
-while true; do
-    npm start
-    printf "\n\n\n${C1}press ${C2}Control+C${C1} to close${NC}\n\n\n"
+#current file number
+num=0
+if [[ -f log/number ]]
+then
+    num=$(cat log/number)
+fi
+
+echo $num > log/number
+
+#watchdog
+while true
+do
+    #increment log file number
+    num=$(( num + 1 ))
+    echo $num > log/number
+
+    #run
+    npm start >> log/$num.out 2> log/$num.err
+
+    #give chance to close program
     sleep 5
+    printf "\n\n\n${C1}press ${C2}Control+C${C1} to close${NC}\n\n\n"
 done
\ No newline at end of file