Can anyone help with changing colors without making a selection

I've been trying to work the the script below. All the front most paths are black I want to change them all to yellow without having to select them first.

Any help would be really appreciated. "I am a novice javascripter"

var myStyles = app.activeDocument.pathItems;

lastStyle=myStyles[myStyles.length-1]

lastStyle.remove();

frontStyle=myStyles[0]

frontStyle.filled=true;

// Sets the default fill color in the current document to yellow.

if ( app.documents.length > 0 ) {

//added

frontPath = frontStyle;

// Define the new color

var newRGBColor = new RGBColor();

newRGBColor.red = 255;

newRGBColor.green = 255;

newRGBColor.blue = 0;

// Use the color object in the path item

frontPath.filled = true;

frontPath.fillColor = newRGBColor;

}