diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..026b752
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+.PHONY: ch13
+ch13:
+\tpython scripts/sim_stroop.py
+\tpython scripts/ch13_stroop_within.py --save-plots
+\tpython scripts/sim_fitness_2x2.py
+\tpython scripts/ch13_fitness_mixed.py --save-plots