--- a/progs/mandelbrot.scala	Wed Nov 08 22:36:42 2017 +0000
+++ b/progs/mandelbrot.scala	Thu Nov 09 16:04:31 2017 +0000
@@ -75,8 +75,8 @@
   val delta_x = (end.a - start.a) / W
   val delta_y = (end.b - start.b) / H
    
-  for (y0 <- (0 until H).par) {
-    for (x0 <- (0 until W).par) {
+  for (y0 <- (0 until H)) {
+    for (x0 <- (0 until W)) {
     
      val c = start + Complex(x0 * delta_x, y0 * delta_y)