If else

Want to do more complex things like just a row of clicks and waits?
You have to get some basic Python knowledge (see faq 1858)
For indentation see: faq 1800

for i in range(153):
    if not exists(image0):
        type(Key.F5)
        continue
    # your stuff on indent level 1
    click image1,
    then wait 1sec,
    click image2,
    click image3,
    wait 3s,
    press F5

for i in range(153):
     if not exists(IMAGE1):
         wait(4)
         type(Key.F5)
         continue
     # your stuff on indent level 1
wait(,1)
find(Pattern(image1).similar(0.94))
click(Pattern(image1).similar(0.89).targetOffset(42,-3)),
wait(2)
click(Pattern(image2).similar(0.89).targetOffset(-340,-13))
click(Pattern(image3).similar(0.82).targetOffset(148,-4))
wait(4)
type(KEY_F5)

Ok its refreshes page if not found image1 and doesnt click img2,3

so what is the problem?

it doesnt clicks image1 !

tried with slow motion?

does the cursor move to image1?

any error messages?

BTW:

for i in range(153):
     if not exists(IMAGE1):
         wait(4)
         type(Key.F5)
         continue
     # your stuff on indent level 1
wait(,1)
find(Pattern(image1).similar(0.94))
click(Pattern(image1).similar(0.89).targetOffset(42,-3)),

are all these image1 the same images?

if yes:
for i in range(153):
     if exists(Pattern(image1).similar(0.94).targetOffset(42,-3)):
         break
     type(Key.F5)
     wait(4)
click(getLastMatch())

And again: pls read carefully at least through faq 1800

On the other hand I do not fully understand what you want to achieve.

buy somethings on steam market

ok, then all the best