from random import randint as r; from time import sleep as s; from time import time as t; MAX=int(input('set max value: '))
while True: st=t(); print(a:=r(0, MAX), '+', b:=r(0, MAX), '=', a+b, '\n ↳', (t()-st), 'sec\n'); s(0.2)

print(3 or 10) # 3
print(0 or 'hello') # 'hello'
print('' or None) # None

print(3 and 10) # 10 
print(0 and 'hello') # 0

from time import sleep; a = ['/', '-', '\\', '|']; pos = 0
while True:
    print('\n'*50, a[pos]); pos += 1
    if pos == len(a): pos = 0
    sleep(0.2)

from time import time; from time import sleep; a = ['/', '-', '\\', '|']; pos = 0; tt=0
while True:
    t=time(); print('\n'*50, a[pos], tt); pos += 1
    if pos == len(a): pos = 0
    sleep(tt:=(time()-t)+0.0001)

from random import choice; from time import sleep; a = 100; b='~'
while True: print(b, a, '\t', (a%-100), '\t\t', choice('£¢€¥$₱₹₽@∆•°π÷©®×#')); b=choice(["+", "-"]); a=eval(f'a{b}1'); sleep(0.025)