diff --git a/Fraktalism/mkjuliagif.sh b/Fraktalism/mkjuliagif.sh
index 67db28f..86b7731 100755
--- a/Fraktalism/mkjuliagif.sh
+++ b/Fraktalism/mkjuliagif.sh
@@ -1,10 +1,24 @@
 #!/bin/bash
 
+#
+#	build the prog
+#
+
+make julia
+if [ $? -ne 0 ] ; then
+	echo
+	echo "Make error " $?
+	exit 1
+fi
+
+#
+#	run the prog
+#
 for foo in $(seq 0 39)
 do
 
 	img=$(printf "frames/%05d.pgm" $foo)
-	bar=$(echo "$foo / 147.0"      | bc -l)
+	bar=$(echo "$foo / 247.0"      | bc -l)
 	cx=$(echo "0.4 * c($foo)"     | bc -l)
 	cy=$(echo "0.4 * s($foo*2)"   | bc -l)