USING: accessors arrays ascii calendar colors colors.gray
combinators.short-circuit fry kernel locals math math.constants
-math.functions math.libm math.order math.points math.ranges
+math.functions math.libm math.order math.points ranges
math.vectors namespaces opengl processing.shapes quotations
random sequences splitting timers ui ui.gadgets
ui.gadgets.borders ui.gadgets.buttons ui.gadgets.frame-buffer