JenScript provides a pie builder for «afionados» of pattern builder with wrapper function.
Resource : chart source code
Learn : javascript pie builder source.
createView = function(container,w,h){
JenScript.view({
name : container,
width : w,
height : h,
holders : 0,
north: 20,
south :20,
}).projection('linear',{
name : "proj1",
minX : -1000,
maxX : 1000,
minY : -1000,
maxY : 1000
}).pie({
radius : 120,
startAngleDegree : 45
}).slice({
name : "s1",
value : 45,
themeColor : 'rgba(240, 240, 240, 0.9)',
}).label('radial',{
text : "Silver",
fillColor:'black',
outlineColor : 'rgba(240, 240, 240, 0.9)',
cornerRadius : 8,
outlineWidth : 2,
textColor :'rgba(240, 240, 240, 0.9)',
}).slice({
name : "s2",
value : 5,
themeColor : '#c0392b'
}).label('radial',{
text : "Platinium",
fillColor:'black',
outlineColor : '#c0392b',
cornerRadius : 8,
outlineWidth : 2,
textColor :'#c0392b',
}).slice({
name : "s3",
value : 30,
themeColor : 'rgba(78,148,44,1)'
}).label('radial',{
text : "Rhodium",
fillColor:'black',
outlineColor : 'rgba(78,148,44,1)',
cornerRadius : 8,
outlineWidth : 2,
textColor :'rgba(78,148,44,1)',
}).slice({
name : "s4",
value : 5,
themeColor : '#d35400',
divergence : 30,
}).label('border',{
text : "Chrome",
fillColor:'black',
outlineColor : '#d35400',
cornerRadius : 8,
outlineWidth : 2,
textColor : '#d35400',
margin : 100
}).slice({
name : "s5",
value : 5,
themeColor : '#8e44ad'
}).label('radial',{
text : "Uranium",
fillColor:'black',
outlineColor : '#8e44ad',
cornerRadius : 8,
outlineWidth : 2,
textColor : '#8e44ad'
}).linearFx({offset : 2, fillOpacity : 0.6,incidence : 1200}).reflectFx({}).linearFx({offset :6,fillOpacity : 0.4,incidence : 300});
}