Oh sorry, I deleted my post because I found a solution (which is, I believe, really messy but it works approximatively...)
To summarize : I launch a song (divided into 6 part (witch 3-witch4 -witch5-witch6-witch7-TapeOut)
I want to display images and texts one after the other, they appear one on top of the other in a somewhat chaotic fashion.
I tried this on my play button :
on click do play["witch3"] card.widgets.canvas1.show: "none" card.widgets.canvas2.show: "none" card.widgets.canvas3.show: "none" card.widgets.canvas4.show: "none" card.widgets.canvas5.show: "none" card.widgets.canvas6.show: "none" card.widgets.field1.show: "none" card.widgets.field2.show: "none" card.widgets.field3.show: "none" card.widgets.field4.show: "none" card.widgets.field5.show: "none" card.widgets.field6.show: "none" sleep[120] card.widgets.canvas1.show: "solid" sleep[120] card.widgets.field1.show: "invert" sleep["play"] play["witch4"] sleep[120] card.widgets.canvas2.show: "solid" sleep[120] card.widgets.field2.show: "invert" sleep[100] card.widgets.canvas3.show: "solid" sleep[100] card.widgets.field3.show: "invert" sleep["play"] play["witch5"] sleep[120] card.widgets.canvas4.show: "solid" sleep[120] card.widgets.field4.show: "invert" sleep[120] card.widgets.canvas5.show: "solid" sleep[120] card.widgets.field5.show: "invert" sleep["play"] play["witch6"] sleep[120] card.widgets.canvas6.show: "solid" sleep[120] card.widgets.field6.show: "invert" sleep[120] card.widgets.canvas7.show: "solid" sleep[120] card.widgets.field7.show: "invert" sleep["play"] play["witch7"] sleep["play"] play["TapeOut"] card.widgets.canvas1.show: "none" card.widgets.canvas2.show: "none" card.widgets.canvas3.show: "none" card.widgets.canvas4.show: "none" card.widgets.canvas5.show: "none" card.widgets.canvas6.show: "none" card.widgets.canvas7.show: "none" card.widgets.field1.show: "none" card.widgets.field2.show: "none" card.widgets.field3.show: "none" card.widgets.field4.show: "none" card.widgets.field5.show: "none" card.widgets.field6.show: "none" card.widgets.field7.show: "none" end