diff --git a/polyround.scad b/polyround.scad
index a932bee..fb98355 100644
--- a/polyround.scad
+++ b/polyround.scad
@@ -432,22 +432,23 @@ function CentreN2PointsArc(p1,p2,cen,mode=0,fn)=
   mode==3, plotted counter clockwise
   */
 	let(
-    CWorCCW=CWorCCW([cen,p1,p2]),//determine the direction of rotation
+    isCWorCCW=CWorCCW([cen,p1,p2]),//determine the direction of rotation
     //determine the arc angle depending on the mode
     p1p2Angle=cosineRuleAngle(p2,cen,p1),
     arcAngle=
       mode==0?p1p2Angle:
       mode==1?p1p2Angle-360:
-      mode==2&&CWorCCW==-1?p1p2Angle:
-      mode==2&&CWorCCW== 1?p1p2Angle-360:
-      mode==3&&CWorCCW== 1?p1p2Angle:
-      mode==3&&CWorCCW==-1?p1p2Angle-360:
-      cosineRuleAngle(p2,cen,p1)
-    ,
+      mode==2&&isCWorCCW==-1?p1p2Angle:
+      mode==2&&isCWorCCW== 1?p1p2Angle-360:
+      mode==3&&isCWorCCW== 1?p1p2Angle:
+      mode==3&&isCWorCCW==-1?p1p2Angle-360:
+      cosineRuleAngle(p2,cen,p1),
     r=pointDist(p1,cen),//determine the radius
 	  p1Angle=getAngle(cen,p1) //angle of line 1
   )
-  [for(i=[0:fn]) [cos(p1Angle+(arcAngle/fn)*i*CWorCCW)*r+cen[0],sin(p1Angle+(arcAngle/fn)*i*CWorCCW)*r+cen[1]]];
+  [for(i=[0:fn])
+  let(angleIncrement=(arcAngle/fn)*i*isCWorCCW)
+  [cos(p1Angle+angleIncrement)*r+cen.x,sin(p1Angle+angleIncrement)*r+cen.y]];
 
 function translateRadiiPoints(radiiPoints,tran=[0,0],rot=0)=
 	[for(i=radiiPoints) 
@@ -539,7 +540,7 @@ function mirrorPoints(radiiPoints,rot=0,endAttenuation=[0,0])= //mirrors a list
   concat(radiiPoints,temp2);
 
 function processRadiiPoints(rp)=
-  [for(i=[0:len(rp)-1]) 
+  [for(i=[0:len(rp)-1])
     processRadiiPoints2(rp,i)
   ];
 
@@ -663,9 +664,9 @@ function getAngle(p1,p2)=p1==p2?0:invtan(p2[0]-p1[0],p2[1]-p1[1]);
 function getMidpoint(p1,p2)=[(p1[0]+p2[0])/2,(p1[1]+p2[1])/2]; //returns the midpoint of two points
 function pointDist(p1,p2)=sqrt(abs(sq(p1[0]-p2[0])+sq(p1[1]-p2[1]))); //returns the distance between two points
 function isColinear(p1,p2,p3)=getGradient(p1,p2)==getGradient(p2,p3)?1:0;//return 1 if 3 points are colinear
-module polyline(p) {
+module polyline(p, width=0.3) {
   for(i=[0:max(0,len(p)-1)]){
-    line(p[i],p[listWrap(i+1,len(p) )]);
+    color([i*1/len(p),1-i*1/len(p),0,0.5])line(p[i],p[listWrap(i+1,len(p) )],width);
   }
 } // polyline plotter
 module line(p1, p2 ,width=0.3) { // single line plotter
diff --git a/roundAnythingExamples.scad b/roundAnythingExamples.scad
index 96f076f..b558580 100644
--- a/roundAnythingExamples.scad
+++ b/roundAnythingExamples.scad
@@ -1,6 +1,7 @@
 include <polyround.scad>
 
 basicPolyRoundExample();
+// polyLineExample();
 // parametricPolyRoundExample();
 // experimentalParametricPolyRoundExample();
 // conflicResolutionExample();
@@ -9,15 +10,23 @@ basicPolyRoundExample();
 // beamChainExample();
 // mirrorPointsExample();
 // radiusExtrudeExample();
-// radiusExtrudePolygon();
 // polyRoundExtrudeExample();
 
 module basicPolyRoundExample(){
+  // polyLine is a dev helper. Aim is to show the points of the polygon and their order before
+  // you're ready to move on to polyRound and a polygon
   radiiPoints=[[-4,0,1],[5,3,1.5],[0,7,0.1],[8,7,10],[20,20,0.8],[10,0,10]];
   polygon(polyRound(radiiPoints,30));
   %translate([0,0,0.3])polygon(getpoints(radiiPoints));//transparent copy of the polgon without rounding
 }
 
+module polyLineExample() {
+  radiiPoints=[[-4,0,1],[5,3,1.5],[0,7,0.1],[8,7,10],[20,20,0.8],[10,0,10]];
+  polyline(polyRound(radiiPoints,3), 0.05);
+  translate([0,10,0])
+  polyline(radiiPoints, 0.05);
+}
+
 module parametricPolyRoundExample() {
   //Example of how a parametric part might be designed with this tool 
   width=20;       height=25;
@@ -67,7 +76,7 @@ module experimentalParametricPolyRoundExample() {
 
 module conflicResolutionExample(){
   //example of radii conflict handling and debuging feature
-  function makeRadiiPoints(r1, r2)=[[0,0,0],[0,20,r1],[20,20,r1],[20,0,0]];
+  function makeRadiiPoints(r1, r2)=[[0,0,0],[0,20,r1],[20,20,r2],[20,0,0]];
 
   // the squre shape being 20 wide, two radii of 10 both fit into the shape (just)
   translate([-25,0,0])polygon(polyRound(makeRadiiPoints(10,10),50));
@@ -79,7 +88,7 @@ module conflicResolutionExample(){
   translate([25,0,0])polygon(polyRound(makeRadiiPoints(10,40),50));
 
   //mode 2 = no radii limiting
-  translate([50,0,0])polygon(polyRound(makeRadiiPoints(15,20),50,mode=2));
+  translate([50,0,0])polygon(polyRound(makeRadiiPoints(12,20),50,mode=2));
 }
 
 module translateRadiiPointsExample() {
@@ -124,9 +133,9 @@ module beamChainExample(){
   function beamPoints(r1,r2,rStart=0,rEnd=0)=[[0,0,rStart],[2,8,0],[5,4,r1],[15,10,r2],[17,2,rEnd]];
 
   // chained lines by themselves
-  translate(){
+  translate([0,0,0]){
     radiiPoints=beamPoints(0,0);
-    for(i=[0: len(radiiPoints)]){color("red")translate([radiiPoints[i].x,radiiPoints[i].y,0])cylinder(d=0.2, h=1);}
+    for(i=[0: len(radiiPoints)-1]){color("red")translate([radiiPoints[i].x,radiiPoints[i].y,0])cylinder(d=0.2, h=1);}
     polygon(polyRound(beamChain(radiiPoints,offset1=0.02, offset2=-0.02),20));
   }
   
@@ -134,7 +143,7 @@ module beamChainExample(){
   // Add some radii to the line transitions
   translate([0,-7,0]){
     radiiPoints=beamPoints(2,1);
-    for(i=[0: len(ex3)]){color("red")translate([radiiPoints[i].x,radiiPoints[i].y,0])cylinder(d=0.2, h=1);}
+    for(i=[0: len(radiiPoints)-1]){color("red")translate([radiiPoints[i].x,radiiPoints[i].y,0])cylinder(d=0.2, h=1);}
     polygon(polyRound(beamChain(radiiPoints,offset1=0.02, offset2=-0.02),20));
   }
   
@@ -184,7 +193,8 @@ module beamChainExample(){
 
   // Define multiple shells from the the one set of points
   translate([0,-7*9,0]){
-    for(i=[0:2]){polygon(polyRound(beamChain(ex3,offset1=-1+i*0.4, offset2=-1+i*0.4+0.25),20));}
+    radiiPoints=beamPoints(2,1,rEnd=3);
+    for(i=[0:2]){polygon(polyRound(beamChain(radiiPoints,offset1=-1+i*0.4, offset2=-1+i*0.4+0.25),20));}
   }
 }