diff -r 780c40aaad27 -r 349d706586ef progs/mandelbrot.scala
--- a/progs/mandelbrot.scala	Sat Dec 16 23:53:28 2017 +0000
+++ b/progs/mandelbrot.scala	Mon Jan 15 23:15:34 2018 +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)
 
@@ -124,10 +124,21 @@
 // some more computations with example 3
 val delta = (exc2 - exc1) * 0.0333
 
-//time_needed(
-//  for (i <- (0 to 12)) 
-//     mandelbrot(exc1 + delta * i, 
-//                exc2 - delta * i, 1000))
+time_needed(
+  for (i <- (0 to 12)) 
+     mandelbrot(exc1 + delta * i, 
+                exc2 - delta * i, 1000))val exc1 = Complex(0.435396403, 0.367981352)
+val exc2 = Complex(0.451687191, 0.380210061)
+
+//time_needed(mandelbrot(exc1, exc2, 1000))
+
+// some more computations with example 3
+val delta = (exc2 - exc1) * 0.0333
+
+time_needed(
+  for (i <- (0 to 12)) 
+     mandelbrot(exc1 + delta * i, 
+                exc2 - delta * i, 1000))