a very simple loop example

examples/loop.geo

+/*
+This is a very simple control sequense
+with 2 imbricated loops
+*/
+
+t = 0.0;
+For (1:10)
+  x = 0.0;
+  For (1:10:2)
+    Point(newp) = {t,x,0,.1};
+    x = x + 0.1;  
+  EndFor
+  t = t + 0.1;  
+EndFor