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diff --git a/dol/examples/example3/src/horizontal_generator.c b/dol/examples/example3/src/horizontal_generator.c
new file mode 100644
index 0000000..501ff1b
--- /dev/null
+++ b/dol/examples/example3/src/horizontal_generator.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <string.h>
+
+#include "horizontal_generator.h"
+
+// initialization function
+void horizontal_generator_init(DOLProcess *p) {
+    sprintf(p->local->str, "nopqrstuvwxyz");
+    p->local->index = 0;
+    p->local->len = strlen(p->local->str);
+}
+
+int horizontal_generator_fire(DOLProcess *p) {
+
+    if (p->local->index < p->local->len) {
+        DOL_write((void*)PORT_OUT, (p->local->str + p->local->index), 1, p);
+        p->local->index++;
+    }
+    else {
+        DOL_detach(p);
+    }
+    return 0;
+}
+