Standing wavs on a string

Edit and compile if you like:

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% Author: Izaak Neutelings (January 2021)
\documentclass[border=3pt,tikz]{standalone}
\usepackage{amsmath}
\usepackage{etoolbox} % ifthen
\usepackage{tikz}
\usepackage{ifthen}
\usetikzlibrary{arrows.meta} % for arrow size
\tikzset{>=latex} % for LaTeX arrow head
\colorlet{xcol}{blue!70!black}
\colorlet{vcol}{green!60!black}
\colorlet{myred}{red!80!black}
\colorlet{myblue}{blue!80!black}
\colorlet{mypurple}{blue!50!red!80}
\colorlet{metalcol}{blue!25!black!30!white}
\tikzstyle{metal}=[draw=metalcol!10!black,rounded corners=0.1,
  top color=metalcol,bottom color=metalcol!80!black,shading angle=10]
\tikzstyle{ring}=[metalcol!20!black,double=metalcol!70!black,double distance=1.2,line width=0.3]
\tikzstyle{rope}=[brown!20!black,double=brown!70!black,
  double distance=0.8,line width=0.1] %very thick,line cap=round
\tikzstyle{wood}=[draw=brown!80!black,rounded corners=0.1,
  top color=brown!80,bottom color=brown!80!black!80,shading angle=10]
%\tikzstyle{myarr}=[-{Latex[length=3,width=2]},vcol!40]
%\tikzstyle{mydoublearr}=[{Latex[length=3,width=2]}-{Latex[length=3,width=2]},vcol!40]
\def\L{6.0}
\def\t{0.12}
\def\H{0.22}   % mount height
\def\h{0.12}   % fret height
\def\r{0.05}   % fret radius
\def\w{0.18}   % fret width
\def\A{0.5*\h} % amplitude
\def\mount#1{
  \draw[metal] ({(1-#1)*\L},0)++(160:\r) arc(160:20:\r)
    -- ({(1-#1)*\L+\w/2},-\H) --++ (-\w,0) -- cycle;
}
\def\fret#1{
  \def\x{(1-#1)*\L}
  \def\xf{\L-#1*\L-0.57*\w}
  %\draw[fill=pink!60!white,line width=0.1,rounded corners=1]
  %  ({\L-#1*\L-1.5*\w},0.033) rectangle++ (0.7*\w,-1.8*\h)
 
 
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