Box plot help

Hello everyone,

I am trying to make this visual from a book by Edward Tufte where he talks about using a stripped down version of the box plot as practice.

I wrote a code but I am unable to figure out why the length of whiskers keep coming out incorrect. Can someone help me out here?

Code:

    sysuse auto, clear
    
    * Name of variable to use for box plot:
    local variable price
    
    * Display boxplot by which group?
    local group foreign
    
    

* Plot type 1    

capture separate `variable', by(`group')
    
    levelsof `group', local(lvl)
    foreach level of local lvl {
        sort `variable'
        
        quietly summ `group'
        local max = `r(max)'
        local min = `r(min)'
        local scale = `r(max)' - `r(min)'
        local offset : display abs(`scale'*0.02)
    
        quietly summ `variable' if `group' == `level', detail
        local level = `level' + 1
        local xlab "`xlab' `level' `" "`:lab (`group') `=`level'-1''" "'"

        local med_p_`level' = `r(p50)'
        local p75_`level' = `r(p75)'
        local p25_`level' = `r(p25)'
        local iqr_`level' = `p75_`level'' - `p25_`level''
        display "Median = `med_p_`level''"
        display "P75 = `p75_`level''"
        display "P25 = `p25_`level''"
        display "IQR = `iqr_`level''"
        display "Low = `=`p25_`level''-(1.5*`iqr_`level'')'"
        display "Max = `=`p75_`level''+(1.5*`iqr_`level'')'""
        display "Varname = `variable'`=`level'-1'"
        
        egen llw_`level' = min(max(`variable'`=`level'-1', `=`p25_`level''-(1.5*`iqr_`level'')'))
        egen uuw_`level' = max(min(`variable'`=`level'-1', `=`p75_`level''+(1.5*`iqr_`level'')'))
        
        quietly summ uuw_`level'
        local max_`level' = `r(mean)'
        quietly summ llw_`level'
        local min_`level' = `r(mean)'        
        
        
        local     lines `lines' ///
                (scatteri `p75_`level'' `level' `max_`level'' `level', recast(line) lpattern(solid) lcolor(black) lwidth(1)) || ///
                (scatteri `p25_`level'' `level' `min_`level'' `level', recast(line) lpattern(solid) lcolor(black) lwidth(1)) || ///
                (scatteri `p75_`level'' `=`level' + `offset'' `p25_`level'' `=`level' + `offset'', recast(line) lpattern(solid) lcolor(black) lwidth(1)) || ///
                (scatteri `med_p_`level'' `=`level' + `offset'', ms(square) mcolor(background)) ||

}
    
    *drop llw* uuw*
    
    twoway `lines', ///
            ytitle("`: variable label `variable''") ///
            ylabel(2000(2000)10000) xtitle("") ///
            xlabel(`xlab', nogrid) ///
            xscale(range(`=`min' + 0.5' `=`max' + 1.5')) ///
            scheme(white_tableau) ///
            title("{bf}Tufte Styled Box Plot", pos(11) margin(b+3) size(*.7)) ///
            subtitle("`: variable label `variable'' grouped by `: variable label `group''", pos(11) margin(b+6 t=-3) size(*.6)) ///
            legend(off)
    
    
    
    * Tufte style box plot version 2
    graph box mpg, box(1, color(white%0)) medtype(marker) medmarker(mcolor(black) mlwidth(0)) cwhiskers alsize(0) intensity(0) over(foreign) lintensity(1) lines(lpattern(solid) lwidth(medium) lcolor(black)) nooutside ylabel(, nogrid) scheme(white_tableau)

The plot type 1 whsiters are different from the one in 2. Can someone kindly check what I am doing wrong in this code, will be grateful.