Help me in solving FXBOX006 problem

My issue

main {
min-width:20px;
height: 80px;
border: 1px solid #c3c3c3;
padding: 20px;
display: flex;
/Put your code below this line/
flex-wrap: wrap;

/----/

}
what does this do explain it in the pictorial form

My code

// your code goes here

Learning course: CSS Intermediate
Problem Link: Right DIRECTION is important in life in CSS Intermediate