Re-root site.

examples/min_grf.fs

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+#! /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
+
+-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