diff --git a/Creating-dockerFile/USING-ENV.md b/Creating-dockerFile/USING-ENV.md
index 13eb4fa..5ed7c89 100644
--- a/Creating-dockerFile/USING-ENV.md
+++ b/Creating-dockerFile/USING-ENV.md
@@ -1,8 +1,10 @@
 # UNDERSTANDING ENV
 About environment variables when docker starts
-* FROM ubuntu
-* RUN apt-get-update
-* ENV workdir=/root/
-* WORKDIR=$workdir
-**Created an environment variable for workdir.**
 
+```dockerfile
+FROM ubuntu
+RUN apt-get-update
+ENV workdir=/root/  
+WORKDIR ${workdir}  # WORKDIR /root/
+# Created an environment variable for workdir
+```
\ No newline at end of file