diff --git a/Makefile b/Makefile
index 6f143e5..0571999 100644
--- a/Makefile
+++ b/Makefile
@@ -1,14 +1,30 @@
+#compiler flags
 CFLAGS=-Wall -Wetra -g
+
+
+#files
 UIF=src/ui.c src/ui.h #UI files
 PLF=src/planner.c src/planner.h #planner files
 DBF=src/db.c src/db.h #db files
+CALF=src/iCal.c src/iCal.h
 CONFIG=src/config.h #config file
-ui: $(UIF)
+
+
+#targets
+debug: ui planner db iCal
+	gcc ui.o planner.o db.o iCal.o -o debugOut 
+
+iCal: $(CALF)
+	gcc -c $(CFLAGS) $(CALF)
+ui: $(UIF) $(CONFIG)
 	gcc -c $(CFLAGS) $(UIF)
-planner: $(PLF)
+planner: $(PLF) $(CONFIG)
 	gcc -c $(CFLAGS) $(PLF)
-db: $(DBF)
+db: $(DBF) $(CONFIG)
 	gcc -c $(CFLAGS) $(DBF)
 
+clean: 
+	rm -rf *.o debugOut
+
 
 
diff --git a/README.md b/README.md
index cd7c583..3ef6a53 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,6 @@ Time management optimisation tool.
 
 ## Processing
 
-- Use cake cutting algorithm to calculate timetable based on subject priorites and available time.
+- Use cake cutting algorithm to calculate timetable based on subject priorities and available time.
 
-- output in ical format
+- output in iCal format
diff --git a/src/iCal.c b/src/iCal.c
new file mode 100644
index 0000000..e69de29
diff --git a/src/iCal.h b/src/iCal.h
new file mode 100644
index 0000000..e69de29