[23 앞당김] 팽이대학교 수학과

\begin{tikzpicture}
    % 長方形
    \filldraw [fill=black!50!white] (-2,-2) rectangle (0,0); 
    % 線を描く
    \draw [very thick](-2,0)--(0,0)--(0,-2);
    % 板を積み重ねていく
    \foreach \x/\y in {0.2/0.3,0.5/0.6,0.9/0.9,1.3/1.2,2/1.5}
    {\filldraw [fill=yellow!50!white] ({-1.5+\x},{\y-0.3}) rectangle ++(2,0.3); }
    % 1枚分を判断する線
    \draw [dashed] (0,0)--(0,2);
    \node at (-1,-1)[fill=white]{机};
  \end{tikzpicture}