Update README.md

Author: ImAwsumm

README.md

@@ -5,6 +5,8 @@ I just want to learn the basics and make a few small programs
 
 If you want to try running some of the very simple programs I made you will need to have GTK installed on your system since I made a program to make a simple window with a few buttons to play around with it  
 
+There's also a new GUI calculator using gtk and css for the style
+
 Here are the instructions to install GCC & GTK on Linux, MacOs and Windows:
 
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