They're painting the roses red... WITH BLOOD!
Alternate subtitle: They're painting the roses DEAD! OOGA BOOGA! SCARY!
So, yeah, more Disney Zombies. This time, it's the playing cards from Alice in Wonderland, specifically the three clubs painting the roses red and the heart that couldn't catch the Queen of Heart's croquet ball in time. Of course, you don't actually see the cards' beheadings in the movie, but I'll just assume the Queen's orders were carried out.