problem with Trans Middle Center

[amirkargar110]

hello
I want to have a dc-dc trans
input 5v 200ma
output = 4 separate 12v 20ma
i wrapped 2,   10 cycle wires around core for primary.
and one 24 cycle for secondary as shown in the attached file.
i changed 4 wires Respectively to change the direction of flow in core. so that i get the best gain.
but unfortunately my output volt(in one output) does not exceed 2.58v.
what should i do to improve my output voltage to 12v?

[PA0PBZ]

You are shorting the primary coils with the diodes.

[amyk]

L3 looks pretty much useless.

[BrianHG]

Q2 will also die, or, you are shorting out your 5v supply.