Quarantine fitness

Tried a challenge yesterday if anyone is up to it, from former American football player Ray Lewis.
One exercise only (push-up, squats, sit-ups, etc.), and to count the rep, you take a deck of cards, you pick one card it gives you the reps, you do the reps, than you pick another card, etc. until the whole deck is completed.
Rep counts is as per the following:
2 -> 10 the number of the card gives the number of reps
J, Q, K -> 10 reps
A -> 25 reps
Joker -> 50 reps.
Did it for pushups without the two jokers yesterday, really hard (for me at least).

If one exercise only isn't much fun (what I can understand), I used to make a variant of the deck of cards. Same principle, but the exercise depend on the suit of the cards and the rep count is a little different:
spades = squats
clubs = pushups
heart = burpees
diamonds = sit-ups
2 -> 10 the number of the card gives the number of reps
J -> 12 reps
Q -> 15 reps
K -> 20 reps
A -> 25 reps
It allow to be always different and with 4 exercises, you can mix it with whatever you want, and it only requires a deck of cards (which is fairly common)