RosettaCodeData/Task/Langtons-ant/Phix/langtons-ant.phix

(phixonline)-->
 <span style="color: #004080;">sequence</span> <span style="color: #000000;">grid</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #008000;">' '</span><span style="color: #0000FF;">,</span><span style="color: #000000;">100</span><span style="color: #0000FF;">),</span><span style="color: #000000;">100</span><span style="color: #0000FF;">)</span>
 <span style="color: #004080;">integer</span> <span style="color: #000000;">aX</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">50</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">aY</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">50</span><span style="color: #0000FF;">,</span>
         <span style="color: #000000;">gXY</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">angle</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span>                      <span style="color: #000080;font-style:italic;">-- ' '/'#';  0,1,2,3 = NESW</span>
 <span style="color: #008080;">constant</span> <span style="color: #000000;">dX</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">}</span>                    <span style="color: #000080;font-style:italic;">-- (dY = reverse(dX))</span>

 <span style="color: #008080;">while</span> <span style="color: #000000;">aX</span><span style="color: #0000FF;">>=</span><span style="color: #000000;">1</span> <span style="color: #008080;">and</span> <span style="color: #000000;">aX</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">100</span>
   <span style="color: #008080;">and</span> <span style="color: #000000;">aY</span><span style="color: #0000FF;">>=</span><span style="color: #000000;">1</span> <span style="color: #008080;">and</span> <span style="color: #000000;">aY</span><span style="color: #0000FF;"><=</span><span style="color: #000000;">100</span> <span style="color: #008080;">do</span>
     <span style="color: #000000;">gXY</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">grid</span><span style="color: #0000FF;">[</span><span style="color: #000000;">aX</span><span style="color: #0000FF;">][</span><span style="color: #000000;">aY</span><span style="color: #0000FF;">]</span>
     <span style="color: #000000;">grid</span><span style="color: #0000FF;">[</span><span style="color: #000000;">aX</span><span style="color: #0000FF;">][</span><span style="color: #000000;">aY</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">67</span><span style="color: #0000FF;">-</span><span style="color: #000000;">gXY</span>           <span style="color: #000080;font-style:italic;">-- ' '&lt;=&gt;'#', aka 32&lt;-&gt;35</span>
     <span style="color: #000000;">angle</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">mod</span><span style="color: #0000FF;">(</span><span style="color: #000000;">angle</span><span style="color: #0000FF;">+</span><span style="color: #000000;">2</span><span style="color: #0000FF;">*</span><span style="color: #000000;">gXY</span><span style="color: #0000FF;">+</span><span style="color: #000000;">3</span><span style="color: #0000FF;">,</span><span style="color: #000000;">4</span><span style="color: #0000FF;">)</span>    <span style="color: #000080;font-style:italic;">-- +/-1, ie 0,1,2,3 -&gt; 1,2,3,0 or 3,0,1,2</span>
     <span style="color: #000000;">aX</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">dX</span><span style="color: #0000FF;">[</span><span style="color: #000000;">angle</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">]</span>
     <span style="color: #000000;">aY</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">dX</span><span style="color: #0000FF;">[</span><span style="color: #000000;">4</span><span style="color: #0000FF;">-</span><span style="color: #000000;">angle</span><span style="color: #0000FF;">]</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">while</span>

 <span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">join</span><span style="color: #0000FF;">(</span><span style="color: #000000;">grid</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">))</span>
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