[{"label":"Gold Star","data":4,"backgroundColor":"rgba(255,215,0,1)"},{"label":"Green Light","data":2,"backgroundColor":"rgba(0,128,0,1)"},{"label":"Yellow Light","data":0,"backgroundColor":"rgba(255,255,0,1)"},{"label":"Red Light","data":0,"backgroundColor":"rgba(255,0,0,1)"}]

...
$dataPoints = array(
  array( "label" => "Gold Star" , "data" => array($gold) , "backgroundColor" => "rgba(255,215,0,1)"),
  array( "label" => "Green Light" , "data" => array($green) , "backgroundColor" => "rgba(0,128,0,1)"),
  array( "label" => "Yellow Light" , "data" => array($yellow) , "backgroundColor" => "rgba(255,255,0,1)"),
  array( "label" => "Red Light" , "data" => array($red) , "backgroundColor" => "rgba(255,0,0,1)" )
);
...