diff --git a/extra/L-system/models/abop-5/abop-5.factor b/extra/L-system/models/abop-5/abop-5.factor
new file mode 100644
index 0000000000..abc346946a
--- /dev/null
+++ b/extra/L-system/models/abop-5/abop-5.factor
@@ -0,0 +1,33 @@
+
+USING: accessors ui L-system ;
+
+IN: L-system.models.abop-5
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: abop-5 ( <L-system> -- <L-system> )
+
+  L-parser-dialect >>commands
+
+  "&(90)+(90)a" >>axiom
+
+  {
+    { "a" "F[+(45)l][-(45)l]^;ca" }
+
+    { "l" "j" }
+    { "j" "h" }
+    { "h" "s" }
+    { "s" "d" }
+    { "d" "x" }
+    { "x" "a" }
+
+    { "F" "'(1.17)F'(.855)" }
+  }
+    >>rules ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: main ( -- ) [ L-system abop-5 "L-system" open-window ] with-ui ;
+
+MAIN: main
+  
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