[Plugin: WordPress Menu Creator] Need css Help

Hi Plugin developer

i can create the menu with out any problem when i paste the code in my theme there is only vertical list of menus which i created ,after i read you plugin page i come to know ,i need to create css my self .can you help me up by provide css for given example in your plugin page

check the image below

https://www.ultimateidx.com/images/opencubemenu.jpg

Thanx in Advance