What zipper said. But Mikeh33, check this out:
https://runfastcoach.com/calc2/index.php
One of the runners in the video was Sidney Gidabuday.
Well, I plugged in 13:30 (roughly Gidabuday's 5000m best) into Tinman's calculator above. The 1200s would be close to tempo, then threshold, then CV, then aerobic power, then VO2 max for Gidabuday on that calculator. I'm guessing that they are jogging a lap between.
Take your 5000 time, plug it in and try that workout. Maybe the last 2 would be pretty tough depending on what kind of runner you are.
Tinman once published a formula for how much CV work you could do in a single workout. It's 420 divided by your 5000 time in minutes. So, again for Gidabuday, 420 divided by 13.5 is 31:07, so if CV pace for 1200 is 3:22 to 3:27, he could do about 9 of them if they were all at CV pace.
Now, if you are a 21 minute 5000 runner, the formula says only do 20 minutes of CV work. So if your CV pace is 5:09 to 5:15 per 1200, you wouldn't want to do more than 4 1200s cause even 4 of them would put you just over 20 minutes.
Again, for the 21 minute runner, your CV 800s last about as long as Gidabuday's CV 1200s, so you could do 5 or 6 800s to get to that 20 minute guideline. Or if you want to do them as cutdowns (first one slower than CV pace, last one faster than CV pace) like in the video, that's OK too. But like zipper said, use the workouts appropriately depending on where you are in your season.