scratch card template example

'fireworks' => array(
	'label'               => __( 'Fireworks', 'mycred' ),
	'minimum_scratch'     => 75,
	'brush_diameter'      => 15,
	'card_width'          => 300,
	'card_height'         => 400,
	'coin_image'          => '', // optional
	'cover_image'         => plugins_url( 'assets/images/templates/fireworks/fireworks-cover.png', MYCRED_SCRATCH ),
	'buy_log'             => '', // optional
	'win_log'             => '', // optional
	'win_message'         => '', // optional
	'setup'               => array(
		array(
			'number'         => 100,
			'value'          => 0,
			'attachment_ids' => array(
				plugins_url( 'assets/images/templates/fireworks/fireworks-nowin.png', MYCRED_SCRATCH )
			)
		),
		array(
			'number'         => 10,
			'value'          => 10,
			'attachment_ids' => array(
				plugins_url( 'assets/images/templates/fireworks/fireworks-win.png', MYCRED_SCRATCH )
			)
		)
	)
)