Bdtyktl

I saw my Chinese classmate reading a book whose cover page is really fancy, though I don’t know the Chinese characters on it.
How could I create a cover page in my own classnotes like that?

Can one do something like this? Yes. Most likely the curves in the upper right part are are some sort of Apollonius (Golden Ratio?) circles but I was too lazy to look them up.

documentclass{article}

usepackage{tikz}

usetikzlibrary{intersections,decorations.text}

definecolor{c1}{RGB}{62, 97, 127}

definecolor{c2}{RGB}{104, 182, 182}

definecolor{c3}{RGB}{107, 190, 190}

definecolor{c4}{RGB}{100, 172, 174}

begin{document}

thispagestyle{empty}

begin{tikzpicture}[overlay,remember picture,font=sffamilybfseries]

 draw[very thick,c4,name path=big arc] ([xshift=-2mm]current page.north) arc(150:285:11)

 coordinate[pos=0.225] (x0);

 begin{scope}

  clip ([xshift=-2mm]current page.north) arc(150:285:11) --(current page.north

  east);

  fill[c4!50,opacity=0.25] ([xshift=4.55cm]x0) circle (4.55);

  fill[c4!50,opacity=0.25] ([xshift=3.4cm]x0) circle (3.4);

  fill[c4!50,opacity=0.25] ([xshift=2.25cm]x0) circle (2.25);

  draw[very thick,c4!50] (x0) arc(-90:30:6.5);

  draw[very thick,c4] (x0) arc(90:-30:8.75);

  draw[very thick,c4!50,name path=arc1] (x0) arc(90:-90:4.675);

  draw[very thick,c4!50] (x0) arc(90:-90:2.875);

  path[name intersections={of=big arc and arc1,by=x1}];

  draw[very thick,c4,name path=arc2] (x1) arc(135:-20:4.75);

  draw[very thick,c4!50] (x1) arc(135:-20:8.75);

  path[name intersections={of=big arc and arc2,by={aux,x2}}];

  draw[very thick,c4!50] (x2) arc(180:50:2.25);

 end{scope} 

 path[decoration={text along path,text color=c4,

                 raise = -2.8ex,

                 text  along path,

                 text = {|sffamilybfseries|02/18/2019},

                 text align = center,

             },

             decorate

         ] ([xshift=-2mm]current page.north) arc(150:245:11);

 %

 begin{scope}

  path[clip,postaction={fill=c3}]

  ([xshift=2cm,yshift=-8cm]current page.center) rectangle ++ (4.2,7.7);

  fill[c2] ([xshift=0.5cm,yshift=-8cm]current page.center)

   ([xshift=0.5cm,yshift=-8cm]current page.center)  arc(180:60:2)

    |- ++ (-3,6) --cycle;

  draw[very thick,c4] ([xshift=-1.5cm,yshift=-8cm]current page.center) 

  arc(180:0:2);

  draw[very thick,c4] ([xshift=0.5cm,yshift=-8cm]current page.center) 

  arc(180:0:2);

  draw[very thick,c4] ([xshift=2.5cm,yshift=-8cm]current page.center) 

  arc(180:0:2);

  draw[very thick,c4] ([xshift=4.5cm,yshift=-8cm]current page.center) 

  arc(180:0:2);

  fill[red] ([xshift=2.5cm,yshift=-8cm]current page.center) +(60:2) circle(1.5mm)

  node[above right=2mm]{$displaystylerho=frac{1+sqrt{-3}}{2}$};

 end{scope}

 %

 fill[c1] ([xshift=2cm,yshift=-8cm]current page.center) rectangle ++ (-12.7,7.7);

 node[text=white,anchor=west,scale=5,inner sep=0pt] at

 ([xshift=-8cm,yshift=-3.25cm]current page.center) {Some text};

 node[text=white,anchor=west,scale=2.5,inner sep=0pt] at

 ([xshift=-8cm,yshift=-6cm]current page.center) {Some text};

 %

 draw[gray,line width=5mm] 

 ([xshift=2mm,yshift=-1mm]current page.south west) rectangle ([xshift=-2mm,yshift=1mm]current

 page.north east);

end{tikzpicture}

end{document}