Looks good to me, though to nitpick the correct order would be anicca, dukkha and anatta.
“What should be done for his disciples out of compassion by a teacher who seeks their welfare and has compassion for them, that I have done for you, bhikkhus. There are these roots of trees, these empty huts. Meditate, bhikkhus, do not delay or else you will regret it later. This is our instruction to you.” - MN 19