Adding heart thing.

ueforth/examples/heart_graph.fs

@@ -0,0 +1,45 @@
+#! /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.
+
+grf
+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