Create Runtime Mesh (plane) Inside linked points Like in the image .

Hello Guys !

 I'm not so familiar with Procedural Mesh , So i was wondering if i can find Someone Here that can Help Me On How i can achieve  this . 

i want to put Some Objects with Same Y Axis , And different ( X . Z ) , and i want to link them , to Create a plane or any mesh inside the Closed shape maked From the starting Point 1 To Number 6 . Like Shown in the image .

Thanks in advance ! it will be so cool if someone can help me ! If so , Give the most details possible !

Best !