\begin{tikzpicture}
  
    \def\raynum{120}

    \foreach \x in {0,...,\raynum} {
        \ifthenelse{\x < 20 \OR \x>100}
        {
            \draw[color = kit-blue100] (\x /\raynum * 6 ,0) -- (3,4);
        }{
            \draw[color = kit-green100] (\x /\raynum * 6 ,0) -- (3,4);
 
        }
    }

    \fill[
        white
    ] (1.49,1) -- (4.51,1) -- (5.01,0) -- (0.99,0) -- cycle;


    \draw [color=kit-blue100] (0,0) -- node[below]{wall} (6,0) ; % wall
    \draw [color=kit-green100](1.5,1) -- node[below]{blocker} (4.5,1); %blocker

    %cam
    \node[
        circle,
        fill = kit-gray100,
        minimum width = 1mm,
        outer sep = 2mm
    ] (camera) at (3,4)  {};
    \node at (camera.north) {camera};


\end{tikzpicture}