diff --git a/zigrtiow/dev.sh b/zigrtiow/dev.sh
new file mode 100755
index 0000000..a5e1797
--- /dev/null
+++ b/zigrtiow/dev.sh
@@ -0,0 +1,2 @@
+fd zig | entr -c bash -c "zig build test && zig build -Drelease-safe=true &&
+  ./zig-out/bin/zigrtiow | convert ppm:- /tmp/output.png"