diff --git a/buildj.v b/buildj.v
index 36b100e..eadc74d 100644
--- a/buildj.v
+++ b/buildj.v
@@ -5,6 +5,7 @@ module main
 // import time
 // import json
 import buildj_util
+import buildj_log
 //import termcolor
 
 // https://bitbucket.org/hatterjiang/archived-study_v/src/master/buildjs.v
@@ -16,11 +17,11 @@ const (
 
 fn main() {
     buildj_util.check_os()
-    show_buildjs_head()
-    println(buildj_util.get_readable_size(1000000))
+    show_buildj_head()
+    buildj_log.print_log(buildj_util.get_readable_size(1000000))
 }
 
-fn show_buildjs_head() {
+fn show_buildj_head() {
     println('${BUILDJ_NAME} - version: ${BUILDJ_VERSION}')
 }
 
diff --git a/buildj_log/buildj_log.v b/buildj_log/buildj_log.v
new file mode 100644
index 0000000..bdd1d4f
--- /dev/null
+++ b/buildj_log/buildj_log.v
@@ -0,0 +1,5 @@
+module buildj_log
+
+pub fn print_log(msg string) {
+    println(msg)
+}