% Author: Prof. Dr. Matthias Jung, DL9MJ
% Year: 2023
\begin{circuitikz}[european]
    % Kalte Luft
    \shade[
        bottom color=white,
        top color=DARCblue!50
    ] (0,0) rectangle (8,3);
    % Warme Luft
    \shade[
        bottom color=DARCorange!50,
        top color=DARCblue!50
    ] (0,3) rectangle (8,4.5);
    % Sehr kalte Luft
    \shade[
        bottom color=DARCblue!50,
        top color=DARCblue
    ] (0,4.5) rectangle (8,4.75);
    \fill[
        DARCblue
    ] (0,4.75) rectangle (8,5.75);
    % Beschriftungen:
    \draw[DARCblue](4,2.5) node[](kl){Kall luft};
    \draw[DARCblue, thick] (kl.east)
        sin ++(0.1,0.1)
        cos ++(0.1,-0.1)
        sin ++(0.1,-0.1)
        cos ++(0.1,+0.1)
        sin ++(0.1,0.1)
        cos ++(0.1,-0.1)
        sin ++(0.1,-0.1)
        cos ++(0.1,+0.1)
        sin ++(0.1,0.1)
        cos ++(0.1,-0.1)
        sin ++(0.1,-0.1)
        cos ++(0.1,+0.1)
        sin ++(0.1,0.1)
        cos ++(0.1,-0.1)
        sin ++(0.1,-0.1)
        cos ++(0.1,+0.1)
        sin ++(0.1,0.1)
        cos ++(0.1,-0.1)
        sin ++(0.1,-0.1)
        cos ++(0.1,+0.1)
        sin ++(0.1,0.1)
        cos ++(0.1,-0.1)
        sin ++(0.1,-0.1)
        cos ++(0.1,+0.1);
    \draw[DARCblue, thick] (kl.west)
        sin ++(-0.1,0.1)
        cos ++(-0.1,-0.1)
        sin ++(-0.1,-0.1)
        cos ++(-0.1,+0.1)
        sin ++(-0.1,0.1)
        cos ++(-0.1,-0.1)
        sin ++(-0.1,-0.1)
        cos ++(-0.1,+0.1)
        sin ++(-0.1,0.1)
        cos ++(-0.1,-0.1)
        sin ++(-0.1,-0.1)
        cos ++(-0.1,+0.1)
        sin ++(-0.1,0.1)
        cos ++(-0.1,-0.1)
        sin ++(-0.1,-0.1)
        cos ++(-0.1,+0.1)
        sin ++(-0.1,0.1)
        cos ++(-0.1,-0.1)
        sin ++(-0.1,-0.1)
        cos ++(-0.1,+0.1)
        sin ++(-0.1,0.1)
        cos ++(-0.1,-0.1)
        sin ++(-0.1,-0.1)
        cos ++(-0.1,+0.1);
    \draw[DARCred](4,3.5) node[](wl){Varm luft};
    \draw[white](4,5.25) node[](skl){Mycket kall luft};
    % Baseline:
    \draw[very thick](0,0) -- (8,0);
    % Skyscrapers:
    \fill[black](0.00,0) rectangle ++(0.20,0.25);
    \fill[black](0.00,0.25) -- ++(0.1,0.1) -- ++(0.1,-0.1);  
    \fill[black](0.25,0) rectangle ++(0.25,1.25);
    \fill[black](0.6,0) rectangle ++(1,0.6);
    \fill[black](1.5,0.6) arc [
        start angle=0,
        end angle=180,
        x radius=0.4,
        y radius=0.4
    ];
    \fill[black](1.65,0) rectangle ++(0.20,0.25);
    \fill[black](1.65,0.25) -- ++(0.1,0.1) -- ++(0.1,-0.1);  
    \fill[black](1.9,0) rectangle ++(0.25,2);
    \draw[black](1.9+0.25/2,2) -- ++(0,0.35);
    \fill[black](2.2,0) rectangle ++(0.25,1);
    \fill[black](2.5,0) rectangle ++(0.5,0.6);
    \fill[black](3.05,0) rectangle ++(0.20,0.25);
    \fill[black](3.05,0.25) -- ++(0.1,0.1) -- ++(0.1,-0.1); 
    \fill[black](3.3,0) -- ++(0.2,2) -- ++(0.2,-2);
    \fill[black](3.5,1.45) ellipse (0.4 and 0.15);
    \fill[black](3.75,0) rectangle ++(0.5,0.6);
    \fill[black](3.75,0.6) -- ++(0.5,0.25) -- ++(0,-0.25);
    \fill[black](4.3,0) rectangle ++(0.25,1.75);
    \fill[black](4.6,0) rectangle ++(0.55,0.6);
    \fill[black](4.75,0) rectangle ++(0.25,0.75);
    \fill[black](5.2,0) rectangle ++(0.20,0.25);
    \fill[black](5.2,0.25) -- ++(0.1,0.1) -- ++(0.1,-0.1); 
    \fill[black](5.4,0) rectangle ++(0.20,0.25);
    \fill[black](5.4,0.25) -- ++(0.1,0.1) -- ++(0.1,-0.1); 
    \fill[black](5.6,0) rectangle ++(0.20,0.25);
    \fill[black](5.6,0.25) -- ++(0.1,0.1) -- ++(0.1,-0.1); 
    \fill[black](5.8,0) rectangle ++(0.20,0.25);
    \fill[black](5.8,0.25) -- ++(0.1,0.1) -- ++(0.1,-0.1); 
    \fill[black](6.0,0) rectangle ++(0.25,1);
    \fill[black](6.3,0) rectangle ++(0.25,1.5);
    \fill[black](6.3,1.5) -- ++(0.125,0.125) -- ++(0.125,-0.125); 
    \fill[black](6.7,0) rectangle ++(0.25,1.75);
    \fill[black](6.7,1.75) -- ++(0.125,0.125) -- ++(0.125,-0.125); 
    \fill[black](7,0) rectangle ++(1,0.6);
    \fill[black](7,0.6) -- ++(0.5,0.25) -- ++(0.5,-0.25);
    %
    \draw [thick,white, -Triangle] (skl.east) ++(+0.25,0) to[out=-90,in=120] (6.25,3.25);
    \draw [thick,white, -Triangle] (skl.west) ++(-0.25,0) to[out=-90,in=60]  (1.75,3.25);
    \draw [thick,white, -Triangle] (skl.east) ++(+1,0)    to[out=-90,in=130] (7.25,3.25);
    \draw [thick,white, -Triangle] (skl.west) ++(-1,0)    to[out=-90,in=50]  (0.75,3.25);
\end{circuitikz}