#Python 2, 86 80 76 74 bytes
for z in range(24):a='/'*5+'\\'*5;print((a*24+a[::-1]*24)*3)[z*60:z*60+60] Could probably golf a few more off it but it's a start.
Edit
Saved 6 by removing some unneeded brackets
Another 4 by using a single string and then reversing it
Thanks @Adnan. Had a late night last night and still not fully awake yet :p