chtt = chart title
cht = chart type
chs = chart size
chd = data
chco = color of data
chl = label of data

Example Code ::

http://chart.apis.google.com/chart?
chtt=Brand
cht=p3&
chs=450x200&
chd=t:73,13,10,4&
chco=80C65A,224499,FF0000&
chl=Singa|LEO|Chang|Tiger

Example Chart ::