#! /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 
640 480 window 
 
: run 
  begin 
    wait 
    0 to color 0 0 width height box 
    g{ 
      vertical-flip 
      3200 3200 viewport 
      $ffcccc to color 
      1600 1600 2900 heart 
      g{ 
        -5 -5 translate 
        $ffffff to color 
        32 for 
            i 100 * 0 10 3200 box 
            0 i 100 * 3200 10 box 
        next 
        $ff0000 to color 
        1600 0 10 3200 box 
        0 2400 3200 10 box 
      }g 
    }g 
    flip 
  FINISHED event = until 
  bye 
; 
run 
 

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