diff --git a/extra/L-system/models/abop-3/abop-3.factor b/extra/L-system/models/abop-3/abop-3.factor
new file mode 100644
index 0000000000..49a63eb074
--- /dev/null
+++ b/extra/L-system/models/abop-3/abop-3.factor
@@ -0,0 +1,25 @@
+
+USING: accessors ui L-system ;
+
+IN: L-system.models.abop-3
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: abop-3 ( <L-system> -- <L-system> )
+
+  L-parser-dialect >>commands
+
+  "c(12)FA" >>axiom
+
+ {
+   { "A" "!(.9)t(.4)FB>(94)B>(132)B" }
+   { "B" "[&t(.4)F$A]" }
+   { "F" "'(1.25)F'(.8)" }
+ }
+   >>rules ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: main ( -- ) [ L-system abop-3 "L-system" open-window ] with-ui ;
+
+MAIN: main
diff --git a/extra/L-system/models/abop-4/abop-4.factor b/extra/L-system/models/abop-4/abop-4.factor
new file mode 100644
index 0000000000..6b2688a478
--- /dev/null
+++ b/extra/L-system/models/abop-4/abop-4.factor
@@ -0,0 +1,54 @@
+
+USING: accessors ui L-system ;
+
+IN: L-system.models.abop-4
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: abop-4 ( <L-system> -- <L-system> )
+
+  L-parser-dialect >>commands
+
+  "c(12)&(20)N" >>axiom
+
+  {
+    {
+      "N"
+      "FII[&(60)rY]>(90)[&(45)'(0.8)rA]>(90)[&(60)rY]>(90)[&(45)'(0.8)rD]!FIK"
+    }
+    { "Y" "[c(4){++l.--l.--l.++|++l.--l.--l.}]" }
+    { "l" "g(.2)l" }
+    { "K" "[!c(2)FF>w>(72)w>(72)w>(72)w>(72)w]" }
+    { "w" "[c(2)^!F][c(5)&(72){-(54)f(3)+(54)f(3)|-(54)f(3)+(54)f(3)}]" }
+    { "f" "_" }
+
+    { "A" "B" }
+    { "B" "C" }
+    { "C" "D" }
+    { "D" "E" }
+    { "E" "G" }
+    { "G" "H" }
+    { "H" "N" }
+
+    { "I" "FoO" }
+    { "O" "FoP" }
+    { "P" "FoQ" }
+    { "Q" "FoR" }
+    { "R" "FoS" }
+    { "S" "FoT" }
+    { "T" "FoU" }
+    { "U" "FoV" }
+    { "V" "FoW" }
+    { "W" "FoX" }
+    { "X" "_" }
+
+    { "o" "$t(-0.03)" }
+    { "r" "~(30)" }
+  }
+    >>rules ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: main ( -- ) [ L-system abop-4 "L-system" open-window ] with-ui ;
+
+MAIN: main
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
+  
\ No newline at end of file