diff --git a/doc/pic/burningship.png b/doc/pic/burningship.png
new file mode 100644
index 0000000..63df13c
Binary files /dev/null and b/doc/pic/burningship.png differ
diff --git a/std/props.nas b/std/props.nas
index c9ba748..5719e37 100644
--- a/std/props.nas
+++ b/std/props.nas
@@ -379,7 +379,7 @@ var dump = func {
     # Don't recurse into aliases, lest we get stuck in a loop
     if(type != "ALIAS") {
         var children = node.getChildren();
-        foreach(c; children) { dump(name ~ "/", c); }
+        foreach(var c; children) { dump(name ~ "/", c); }
     }
 }
 
@@ -498,7 +498,7 @@ var createNodeObjectsFromHash = func (property_list, namespace = nil) {
         logprint(LOG_WARN, "createNodeObjectsFromHash: Error, property_list argument is not a hash.");
         return nil;
     }
-    foreach (key; keys(property_list)) {
+    foreach (var key; keys(property_list)) {
         namespace[key] = props.getNode(property_list[key],1);
     }
 }
@@ -743,7 +743,7 @@ var UpdateManager =
         obj.needs_update = 0;
         obj.property = {};
         obj.is_numeric = {};
-        foreach (hashkey; obj.hashkeylist) {
+        foreach (var hashkey; obj.hashkeylist) {
             obj.property[hashkey] = props.globals.getNode(hashkey);
             obj.lastval[hashkey] = nil;
 #            var ty = obj.property[hashkey].getType();
@@ -833,7 +833,7 @@ var UpdateManager =
                 me.needs_update = 0;
 
               if (obj != nil or me.lastval == nil) {
-                  foreach (hashkey; me.hashkeylist) {
+                  foreach (var hashkey; me.hashkeylist) {
                       if (me.isnum) {
                           if (me.lastval[hashkey] == nil or math.abs(me.lastval[hashkey] - obj[hashkey]) >= me.delta) {
                               me.needs_update = 1;
@@ -847,7 +847,7 @@ var UpdateManager =
               }
               if (me.needs_update) {
                   me.changed(obj);
-                  foreach (hashkey; me.hashkeylist) {
+                  foreach (var hashkey; me.hashkeylist) {
                       me.lastval[hashkey] = obj[hashkey];
                   }
               }
diff --git a/test/burningship.nas b/test/burningship.nas
new file mode 100644
index 0000000..a247522
--- /dev/null
+++ b/test/burningship.nas
@@ -0,0 +1,45 @@
+import.std.process_bar;
+
+var ppm = func(filename, width, height, RGB) {
+    # P3 use ASCII number
+    # P6 use binary character
+    var fd = io.open(filename, "wb");
+    io.write(fd, "P6\n"~width~" "~height~"\n255\n");
+    for(var i = 0; i<height; i += 1) {
+        for(var j = 0; j<width; j += 1) {
+            io.write(fd,RGB(i,j));
+        }
+    }
+    io.close(fd);
+}
+
+var width = 1920;
+var height = 1080;
+var bar = (os.platform()=="windows")?
+    process_bar.bar(front:"sharp", back:"point", sep:"line", length:50):
+    process_bar.high_resolution_bar(50);
+
+var f = func(i, j) {
+    var (yMin, yMax, xMin, xMax) = (-2, 1.1, -3.2, 2);
+    var (yDel, xDel) = (yMax-yMin, xMax-xMin);
+    var (y, x) = ((i/height)*yDel+yMin, (j/width)*xDel+xMin);
+    var (x0, y0) = (x, y);
+    for(var iter = 0; iter<64; iter += 1) {
+        (x0, y0) = (math.abs(x0), math.abs(y0));
+        var (x1, y1) = ((x0*x0)-(y0*y0)+x, 2*x0*y0+y);
+        (x0, y0) = (x1, y1);
+        if ((x0*x0)+(y0*y0)>8) {
+            break;
+        }
+    }
+    var progress = (i*width+j+1)/(width*height);
+    if (progress*100-int(progress*100)==0) {
+        print(bar.bar(progress), " ", progress*100, "%          \r");
+    }
+    iter = iter>=25? 255:int(iter/25*255);
+    var c = char(iter);
+    return c~c~c;
+}
+
+ppm("burningship.ppm", width, height, f);
+println();
diff --git a/test/feigenbaum.nas b/test/feigenbaum.nas
index 6f1535d..b235ae8 100644
--- a/test/feigenbaum.nas
+++ b/test/feigenbaum.nas
@@ -1,6 +1,6 @@
 import.std.process_bar;
 
-var ppm=func(filename, width, height, RGB){
+var ppm = func(filename, width, height, RGB) {
     # P3 use ASCII number
     # P6 use binary character
     var fd = io.open(filename, "wb");
@@ -15,8 +15,8 @@ var ppm=func(filename, width, height, RGB){
 
 var width = 1600;
 var height = 900;
-var bar=(os.platform()=="windows")?
-    process_bar.bar(front:"sharp",back:"point",sep:"line",length:50):
+var bar = (os.platform()=="windows")?
+    process_bar.bar(front:"sharp", back:"point", sep:"line", length:50):
     process_bar.high_resolution_bar(50);
 
 var RGB = func(h, w) {
diff --git a/test/ppmgen.nas b/test/ppmgen.nas
index 75e725d..f200056 100644
--- a/test/ppmgen.nas
+++ b/test/ppmgen.nas
@@ -1,41 +1,43 @@
 import.std.process_bar;
 
-var ppm=func(filename,width,height,RGB){
+var ppm = func(filename, width, height, RGB) {
     # P3 use ASCII number
     # P6 use binary character
-    var fd=io.open(filename,"wb");
-    io.write(fd,"P3\n"~width~" "~height~"\n255\n");
-    for(var i=0;i<height;i+=1){
-        for(var j=0;j<width;j+=1)
+    var fd = io.open(filename, "wb");
+    io.write(fd, "P6\n"~width~" "~height~"\n255\n");
+    for(var i = 0; i<height; i += 1) {
+        for(var j = 0; j<width; j += 1) {
             io.write(fd,RGB(i,j));
-        io.write(fd,"\n");
+        }
     }
     io.close(fd);
 }
 
-var width=1920;
-var height=1080;
-var bar=(os.platform()=="windows")?
-    process_bar.bar(front:"sharp",back:"point",sep:"line",length:50):
+var width = 1920;
+var height = 1080;
+var bar = (os.platform()=="windows")?
+    process_bar.bar(front:"sharp", back:"point", sep:"line", length:50):
     process_bar.high_resolution_bar(50);
-var f=func(i,j){
-    var (yMin,yMax,xMin,xMax)=(-1.35,1.35,-3.3,1.5);
-    var (yDel,xDel)=(yMax-yMin,xMax-xMin);
-    var (y,x)=((i/height)*yDel+yMin,(j/width)*xDel+xMin);
-    var (x0,y0)=(x,y);
-    for(var iter=0;iter<64;iter+=1){
-        var (x1,y1)=((x0*x0)-(y0*y0)+x,2*x0*y0+y);
-        (x0,y0)=(x1,y1);
-        if((x0*x0)+(y0*y0)>4){
+var f = func(i, j) {
+    var (yMin, yMax, xMin, xMax) = (-1.35, 1.35, -3.3, 1.5);
+    var (yDel, xDel) = (yMax-yMin, xMax-xMin);
+    var (y, x) = ((i/height)*yDel+yMin, (j/width)*xDel+xMin);
+    var (x0, y0) = (x, y);
+    for(var iter = 0; iter<64; iter += 1) {
+        var (x1, y1) = ((x0*x0)-(y0*y0)+x, 2*x0*y0+y);
+        (x0, y0) = (x1, y1);
+        if ((x0*x0)+(y0*y0)>4) {
             break;
         }
     }
-    var progress=(i*width+j+1)/(width*height);
-    if(progress*100-int(progress*100)==0){
-        print(bar.bar(progress)," ",progress*100,"%          \r");
+    var progress = (i*width+j+1)/(width*height);
+    if (progress*100-int(progress*100)==0) {
+        print(bar.bar(progress), " ", progress*100, "%          \r");
     }
-    iter=iter==25?255:int(iter/25*255);
-    return iter~" "~iter~" "~iter~" ";
+    iter = iter>=25? 255:int(iter/25*255);
+    var c = char(iter);
+    return c~c~c;
 }
-ppm("a.ppm",width,height,f);
+
+ppm("mandelbrotset.ppm", width, height, f);
 println();