\begin{tikzpicture}[sketch]

%Achsen:
\draw[->](0,-1)--(0,4)node[right, awesome]{branch cut};
\draw[->](-4,0)--(4,0);

%Blauer Pfad
%Nodes
\node[inner sep=0pt] (LC) at (-3,0){};
\node[inner sep=0pt](RC) at (3,0){};
\node[inner sep=0pt](RL) at (89:3){};
\node[inner sep=0pt](rdl) at ($(RL)+(0,-1)$){};
\node[inner sep=0pt](LL) at (91:3){};
\node[inner sep=0pt](ldl) at ($(LL)+(0,-1)$){};
\node[inner sep=0pt](scc) at ($(90:3)+(0,-1.5)$){};

%RED CROSS
\fill[awesome](scc) circle (0.07)node[label={[label distance=0cm]-20:$+ im$}]{};
\draw[awesome](scc)--++(45:0.2);
\draw[awesome](scc)--++(-45:0.2);
\draw[awesome](scc)--++(135:0.2);
\draw[awesome](scc)--++(-135:0.2);
\draw[awesome,line width=0.8mm](scc)--(0,3.8);

%BLUE PATH
\draw[->, dodgerblue](LC)--(-1.5,0);
\draw[->, dodgerblue](-1.7,0)--(1.5,0)node[label={[label distance=-1.5cm]20:A}]{};
\draw[dodgerblue](1.3,0)--(RC) arc(-0.5:89:3)--(rdl);% arc(88:-260:0.5)--(LL) arc(91:180.5:3);
\draw[dodgerblue]($(90:3)+(0,-1.5)$) circle(0.5)node[label={[label distance=0.25cm]10:$D \rightarrow 0$}]{};
\draw[dodgerblue](ldl)--(LL) arc(91:180.5:3);

%Arrows:
\draw[dodgerblue, ->](RC) arc(-0.5:45:3)node[label={[label distance=0cm]0:$B \rightarrow 0$}]{};
\draw[dodgerblue, ->](RL)--($(RL)+(0,-0.75)$)node[label={[label distance=-0.15cm]0:$C$}]{};
\draw[dodgerblue, ->]($(LL)+(0,-1)$)--($(LL)+(0,-0.25)$)node[label={[label distance=-0.15cm]200:$C=E$}]{};
\draw[dodgerblue, ->](LL) arc(91:135:3)node[label={[label distance=0cm]180:$0 \leftarrow F$}]{};

%BLACK NODES
\fill(LC) circle(0.05);
\fill(RC) circle(0.05);
\fill(RL) circle(0.05);
\fill(rdl) circle(0.05);
\fill(ldl) circle(0.05);
\fill(LL) circle(0.05);

\draw[<->, teal](45:0.15)--(45:2.85)node[label={[label distance=0.5cm]270:$R \rightarrow \infty$}]{};
\draw[teal](scc)--++(200:0.5)node[label={[label distance=-0.3cm]200:$0 \leftarrow \varepsilon$}]{};

\node at (0,-2){$\lim\limits_{\substack{R\to\infty\\\varepsilon\to 0}}\displaystyle\oint\ldots=A+C+E\stackrel{\text{Cauchy}}{=}0$};

%\draw[dodgerblue](0,1.98) arc(88:-90:0.5);
\end{tikzpicture}