$scoreboard players set .trackselectednumber constants $(pass)
scoreboard players add .trackselectednumber constants 1
data merge entity @n[tag=tracks.numdisplay] {text:[{"score":{"name":".trackselectednumber","objective":"constants"}},{"text":"/"},{"nbt":"tracks.tracksnumber","storage":"funkalot:tracks"}]}
$function funkalot:tracks/selection/highlightmodify with storage funkalot:tracks tracks.list[$(pass)]