loop between subs

hi , how are you guys ? i hope you all fine ...

here is the poblem
i have some functions and i want to make loop between them
here is an example for the thing that i want to do

sub1 :showitems1()
msgbox "showitems1"
end sub
sub2 :showitems2()
sub3 :showitems3()

and i want to loop now but i couldnt like this

private sub a_click()
for i = 1 to 3
("showitems"& str(i))
next i
end sub

thank you