--- /dev/null
+
+USING: accessors ui L-system ;
+
+IN: L-system.models.abop-2
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: abop-2 ( <L-system> -- <L-system> )
+
+ L-parser-dialect >>commands
+
+ [ 30 >>angle ] >>turtle-values
+
+ "c(12)FAL" >>axiom
+
+ {
+ { "A" "F [&'(.7)!BL] >(137) [&'(.6)!BL] >(137) '(.9) !(.9) A" }
+
+ { "B" "F [- '(.7) !(.9) $ C L] '(.9) !(.9) C" }
+ { "C" "F [+ '(.7) !(.9) $ B L] '(.9) !(.9) B" }
+
+ { "L" "~c(8){+f(.1)-f(.1)-f(.1)+|+f(.1)-f(.1)-f(.1)}" }
+
+ } >>rules ;
+
+
+! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+: main ( -- ) [ L-system abop-2 "L-system" open-window ] with-ui ;
+
+MAIN: main