diff --git a/tikz/2d-parted-function/Makefile b/tikz/2d-parted-function/Makefile
index f4f67bc..51cbf2c 100644
--- a/tikz/2d-parted-function/Makefile
+++ b/tikz/2d-parted-function/Makefile
@@ -29,5 +29,5 @@ svg:
 	pdf2svg $(SOURCE).pdf $(SOURCE).svg
 	# Necessary, as pdf2svg does not always create valid svgs:
 	inkscape $(SOURCE)1.svg --export-width=$(WIDTH) --export-plain-svg=$(SOURCE)1.svg
-	inkscape $(SOURCE).svg --export-plain-svg=$(SOURCE).svg
+	rsvg-convert -a -w 720 -f svg $(SOURCE)1.svg -o $(SOURCE).svg
 	rm $(SOURCE)1.svg
\ No newline at end of file
diff --git a/tikz/lda-gauss-1/Makefile b/tikz/lda-gauss-1/Makefile
index 1538f1e..9893234 100644
--- a/tikz/lda-gauss-1/Makefile
+++ b/tikz/lda-gauss-1/Makefile
@@ -30,3 +30,4 @@ svg:
 	# Necessary, as pdf2svg does not always create valid svgs:
 	inkscape $(SOURCE)1.svg --export-width=$(WIDTH) --export-plain-svg=$(SOURCE)1.svg
 	rsvg-convert -a -w 720 -f svg $(SOURCE)1.svg -o $(SOURCE).svg
+	rm $(SOURCE)1.svg
\ No newline at end of file
diff --git a/tikz/quadratic-function/Makefile b/tikz/quadratic-function/Makefile
new file mode 100644
index 0000000..1db9aa6
--- /dev/null
+++ b/tikz/quadratic-function/Makefile
@@ -0,0 +1,33 @@
+SOURCE = quadratic-function
+DELAY = 80
+DENSITY = 300
+WIDTH = 512
+
+make:
+	pdflatex $(SOURCE).tex -output-format=pdf
+	make clean
+
+clean:
+	rm -rf  $(TARGET) *.class *.html *.log *.aux *.data *.gnuplot
+
+gif:
+	pdfcrop $(SOURCE).pdf
+	convert -verbose -delay $(DELAY) -loop 0 -density $(DENSITY) $(SOURCE)-crop.pdf $(SOURCE).gif
+	make clean
+
+png:
+	make
+	make svg
+	inkscape $(SOURCE).svg -w $(WIDTH) --export-png=$(SOURCE).png
+
+transparentGif:
+	convert $(SOURCE).pdf -transparent white result.gif
+	make clean
+
+svg:
+	#inkscape $(SOURCE).pdf --export-plain-svg=$(SOURCE).svg
+	pdf2svg $(SOURCE).pdf $(SOURCE).svg
+	# Necessary, as pdf2svg does not always create valid svgs:
+	inkscape $(SOURCE).svg --export-width=$(WIDTH) --export-plain-svg=$(SOURCE)1.svg
+	rsvg-convert -a -w 720 -f svg $(SOURCE)1.svg -o $(SOURCE).svg
+	rm $(SOURCE)1.svg
\ No newline at end of file
diff --git a/tikz/quadratic-function/README.md b/tikz/quadratic-function/README.md
new file mode 100644
index 0000000..3e1f1b0
--- /dev/null
+++ b/tikz/quadratic-function/README.md
@@ -0,0 +1,3 @@
+Compiled example
+----------------
+![Example](quadratic-function.png)
diff --git a/tikz/quadratic-function/quadratic-function.png b/tikz/quadratic-function/quadratic-function.png
new file mode 100644
index 0000000..a04ab00
Binary files /dev/null and b/tikz/quadratic-function/quadratic-function.png differ
diff --git a/tikz/quadratic-function/quadratic-function.tex b/tikz/quadratic-function/quadratic-function.tex
new file mode 100644
index 0000000..48bd915
--- /dev/null
+++ b/tikz/quadratic-function/quadratic-function.tex
@@ -0,0 +1,36 @@
+\documentclass[varwidth=true, border=2pt]{standalone}
+
+\usepackage{pgfplots}
+\usepackage{tikz}
+\usepackage{helvet}
+\usepackage[eulergreek]{sansmath}
+
+\pgfplotsset{
+tick label style = {font=\sansmath\sffamily},
+every axis label/.append style={font=\sffamily\footnotesize},
+}
+
+\begin{document}
+\begin{tikzpicture}
+    \begin{axis}[
+        % legend pos=south west,
+        axis x line=middle,
+        axis y line=middle,
+        % grid = major,
+        width=10cm,
+        height=6.4cm,
+        % grid style={dashed, gray!30},
+        xmin=-6,     % start the diagram at this x-coordinate
+        xmax= 6,     % end   the diagram at this x-coordinate
+        ymin=-0.25,  % start the diagram at this y-coordinate
+        ymax= 36,    % end   the diagram at this y-coordinate
+        % axis background/.style={fill=white},
+        xtick = {-6, -4,..., 6},
+        ytick = {0, 5,..., 35},
+        tick align=outside,
+        enlargelimits=true,
+        tension=0.08]
+      \addplot[domain=-6:6, red, thick,samples=200] {x*x};  
+    \end{axis} 
+\end{tikzpicture}
+\end{document}