Update 'README.md'

README.md

@@ -1,3 +1,19 @@
 # XCB-Present-test
 
-Little test that I made to figure out how use the Present extension of X11 with XCB.
+Little test that I made to figure out how use the Present extension of X11 with XCB.
+It animates a bar going from left to right. That's it.
+I didn't put in any code to manage its size so don't resize its window.
+
+To compile, just run
+>make
+
+Dependencies :
+    - C99 + posix
+    - libxcb
+    - libxcb-present
+    - libxcb-util
+    - libcairo
+
+Controls:
+    - any mouse input to stop/resume the animation
+    - any keyboard input to exit the program