RED RUNNING SPIKES: I made the drawing with pencils and after blending them, I added acrylic yellow color for the dots of the plant. And at the end I also used some white pastel on the paper to add some texture.
https://fineartamerica.com/featured/red-running-spikes-lucia-waterson.html?newartwork=true
I know that usually shoes go in pairs, so you might wonder where is the other shoe? Well, my cat is obsessed with shoes and that one is her favorite toy. But that is an other story and an other painting, most probably. As for this shoe, my cat is quite intelligent and doesn't get close to it because of the spikes. (The story is invented...like the plant in the shoe)
Thank you very much Abbie!