diff --git a/etc/circle128/build.sh b/etc/circle128/build.sh
index 3f6caa9..2bc7a30 100755
--- a/etc/circle128/build.sh
+++ b/etc/circle128/build.sh
@@ -2,6 +2,5 @@
 
 clang-format -i circle128.c
 rm -f circle128
-cc -lm circle128 -o circle128.c
-circle128 128
-
+cc -lm -o circle128 circle128.c
+./circle128 64