Coding skewed footer background

Site URL: https://www.DelawareRising.club

Hello!

I'm trying to code my footer so that there are white and cyan parts that is skewed, creating two side by side sections.
I'm not sure how to target just the background and not the entire section and its content...

#preFooter {
background: linear-gradient (50deg, #ffffff, #3bccfc);
transform: skew(45deg);
     background-size: 100% ;
     padding: 0px 0px 0px 0px;
     margin: 0em 0em 0em 0em;
     background-repeat:  no-repeat;
    resize: none;
}

Hi,

For which section on footer?