--- /dev/null
+
+USING: accessors kernel ui L-system ;
+
+IN: L-system.models.abop-1
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: abop-1 ( <L-system> -- <L-system> )
+
+ L-parser-dialect >>commands
+
+ "c(12)FFAL" >>axiom
+
+ {
+ { "A" "F[&'(.8)!BL]>(137)'!(.9)A" }
+ { "B" "F[-'(.8)!(.9)$CL]'!(.9)C" }
+ { "C" "F[+'(.8)!(.9)$BL]'!(.9)B" }
+
+ { "L" "~c(8){+(30)f-(120)f-(120)f}" }
+ }
+ >>rules
+
+ dup axiom>> >>string ;
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: main ( -- ) [ L-system abop-1 "L-system" open-window ] with-ui ;
+
+MAIN: main