I want to fill the
In your code, you where creating several path elements where each element had one curveTo subpath. Instead, you need one path element with several curveTo subpaths. In your scenario, the simpler quadratic Bezier curve will work well. After the curveTo subpaths, you will need some lineTo subpaths to define the area under the curves. For example...
<svg height="150" width="880">
<path d="M 0 100 q 40 -40 80 0 q 40 40 80 0 q 40 -40 80 0 q 40 40 80 0 q 40 -40 80 0 q 40 40 80 0 q 40 -40 80 0 q 40 40 80 0 q 40 -40 80 0 q 40 40 80 0 q 40 -40 80 0 l 0 50 l -880 0 z" stroke="rgb(255, 195, 56)" stroke-width="5" fill="rgb(255, 195, 56)"/>
</svg>
For such a shape, you can use an svg pattern and fill a rectangle width the pattern as shown in the following example :
html,body{margin:0;padding:0;}
div{
background: url('http://i.imgur.com/qi5FGET.jpg');
background-size:cover;
overflow:hidden;
}
svg{display:block;}
<div>
<h1>title</h1>
<p>whatever content<br/>with several lines</p>
<svg viewbox="0 0 60 10">
<pattern x="-7.5" id="waves" patternUnits="userSpaceOnUse" width="10" height="10">
<path d="M0 10 V5 Q2.5 2.5 5 5 T10 5 V10" fill="#FFC338" />
</pattern>
<rect x="0" y="0" width="60" height="10" fill="url(#waves)"/>
</svg>
</div>