function customfield_1_shortcode( $atts ) {

            if ( get_post_meta( get_the_ID(), 'customfield1', true ) ) {
        $customfield = get_post_meta( get_the_ID(), 'customfield1', true );

    return "html stuff";
}
add_shortcode( 'customfield_1', 'customfield_1_shortcode' );

function customfield_2_shortcode( $atts ) {

            if ( get_post_meta( get_the_ID(), 'customfield2', true ) ) {
        $customfield = get_post_meta( get_the_ID(), 'customfield2', true );

    return "html stuff";
}
add_shortcode( 'customfield_2', 'customfield_2_shortcode' );
?>`enter code here`