diff --git a/after.png b/after.png
new file mode 100644
index 00000000..7d731db0
Binary files /dev/null and b/after.png differ
diff --git a/branch.png b/branch.png
new file mode 100644
index 00000000..c0c3b538
Binary files /dev/null and b/branch.png differ
diff --git a/my_03-happy.sh b/my_03-happy.sh
new file mode 100644
index 00000000..79c87be6
--- /dev/null
+++ b/my_03-happy.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+echo "You are happy?"
+read answer
+
+if [ "$answer" = "yes" ]; then
+   echo "Smile :)"
+else
+   echo "Still Smile :)"
+fi
+
+# here are the other string comparison operators
+# != , -n (not an empty string) , -z (an empty string)
+
+# exercise: write a script that prints whether today is
+# the weekend or not
+echo "Which day of a week is today?"
+read day
+
+if [[ ${day,,} == "saturday"  || ${day,,} == "sunday" ]]
+
+then 
+   echo "Horayyyy!! Today is the weekend. Enjoy yourself! Be ready for the next week."
+else 
+   echo "Today is a weekday. Keep focus on your work."
+fi
\ No newline at end of file
diff --git a/my_copy.txt b/my_copy.txt
new file mode 100644
index 00000000..d334fa85
--- /dev/null
+++ b/my_copy.txt
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+echo "Hello My Tran!"
+echo "How old are you?" 
+read age
+echo 'Thanks My! I see you are ' $age ' years old'
+
+echo "What school do you currently attend?"
+read school
+echo 'Nice! ' $school ' sounds like a great place to learn.'