Change icon of warn of new post/threads

[Zoiter7]

Hello, how I can change this icon. This icons show when have a new post or someobdy created a new post and you not readed this.





PD: Sorry for my bad English.

[.m.]

which theme you are using ? you can change the image file (jump.png) directly in images folder of your theme.

[Zoiter7]

which theme you are using ? you can change the image file (jump.png) directly in images folder of your theme.

In jump.png is other image, I view the image is of font icon 
<i style="font-size: 14px;" class="fa fa-caret-right fa-fw"

I don't know in which template I can edit this.
I use Square theme.

[.m.]

Square theme templates >> Forum Display Templates >> forumdisplay_thread_gotounread

[Zoiter7]

Square theme templates >> Forum Display Templates >> forumdisplay_thread_gotounread

Thanks! 
Can you help with the html?  I can't put a image on the start. Is a wrong use in html

<a href="{$thread['newpostlink']}" class="effect"><i style="font-size: 14px;"  alt="{$lang->goto_first_unread}" title="{$lang->goto_first_unread}" <img src="/new.gif"></i></a>

[.m.]

<a href="{$thread['newpostlink']}" class="effect"><img src="{$mybb->settings['bburl']}/new.gif" alt="{$lang->goto_first_unread}" title="{$lang->goto_first_unread}" /></a> 

[Zoiter7]

<a href="{$thread['newpostlink']}" class="effect"><img src="{$mybb->settings['bburl']}/new.gif" alt="{$lang->goto_first_unread}" title="{$lang->goto_first_unread}" /></a> 

And for put the image after the title? 
I have been trying and I couldn't change it

[.m.]

^ suggested code includes image. you can replace the code in forumdisplay_thread_gotounread template with suggested code

[Zoiter7]

^ suggested code includes image. you can replace the code in forumdisplay_thread_gotounread template with suggested code

I replaced it, but the image show in the before the title, and the questions is, if is possible put the image after the title of thread?

[.m.]

^ okay. I missed your requirement.
template => forumdisplay_thread (in Forum Display Templates)
find {$gotounread} and move it after {$thread['subject']}</a> & save the template