diff --git a/test.dot b/test.dot
new file mode 100644
index 0000000..fb6ac70
--- /dev/null
+++ b/test.dot
@@ -0,0 +1,10 @@
+digraph {
+    node        [shape = "rect", style = "rounded", fontname = "JetBrainsMono"];
+    entry       [label = "", shape = "circle", style = "filled", color = "black"];
+    adc_init    [label = "initialise ADC"];
+    loop        [label = "", shape = "circle", style = "filled", color = "gray"];
+
+    entry -> adc_init
+    adc_init -> loop
+    loop -> entry
+}