how to use the previous number generated by

how to use the previous number generated by
random()?

Set it into a variable, as follows:

x = random() # Set x to a random number
print x
oval(10, 10, x, x) # x is always the same value

Yes, but I am making a loop with a random within it, that will generate a random
Position of an object, eg

X1 = random (50)
Y1 = random (50)

X2 = next value generated by random
Y2 = next value generated by random
oval (x, y, 10,10)
line (x1, y1, x2, y2)

Actually I do not need the previous value, but the next value generated at random ()
Understand + -?

sorry about my english...

There are a few ways to do this. One of the easiest is to remember the previous numbers in global variables, and use these, e.g.

speed(10)
 
def setup():
    global prevx, prevy
    prevx, prevy = random(50), random(50)
    
def draw():
    global prevx, prevy
    x, y = random(50), random(50)
    oval(x-5, y-5, 10, 10)
    line(prevx, prevy, x, y, stroke=0)
    prevx, prevy = x, y

size(200, 200)
speed(10)
 
def setup():
    global trails
    trails = []
    
def draw():
    global trails
 
    x, y = random(200), random(200)
    trails.append((x, y))
    
    x0, y0 = trails[0]
    for x1, y1 in trails[1:]:
        line(x0, y0, x1, y1, stroke=0)
        x0, y0 = x1, y1
 
    oval(x-5, y-5, 10, 10)
    trails = trails[-10:]