#! /usr/bin/env ueforth 
\ Copyright 2022 Bradley D. Nelson 
\ 
\ Licensed under the Apache License, Version 2.0 (the "License"); 
\ you may not use this file except in compliance with the License. 
\ You may obtain a copy of the License at 
\ 
\     http://www.apache.org/licenses/LICENSE-2.0 
\ 
\ Unless required by applicable law or agreed to in writing, software 
\ distributed under the License is distributed on an "AS IS" BASIS, 
\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
\ See the License for the specific language governing permissions and 
\ limitations under the License. 
 
graphics 
 
-1 -1 window 
 
$ff0000 constant red 
$ffff00 constant yellow 
$000000 constant black 
 
: draw 
  black to color  0 0 width height box 
  yellow to color  0 0 width 2/ height 2/ box 
  red to color    mouse-x mouse-y width 10 / height 10 / box 
  flip 
; 
 
: run 
  begin 
    poll 
    IDLE event = if draw then 
  event FINISHED = until 
  bye 
; 
run 
 

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