Can someone explain me what the below pinescript does

Hi I got the below pinescript code from trading view. I want to convert it to trade script, so need to understand it.

range = high - low

// Daily line breaks
sopen = security(tickerid, D, open)

a=range[1]*0.382
b=range[1]*0.618
h=sopen+a
h1=sopen+b
l=sopen-a
l1=sopen-b

// Color
hcolor=sopen != sopen[1] ? na : maroon
hcolor1=sopen != sopen[1] ? na : red
lcolor=sopen != sopen[1] ? na : green
lcolor1=sopen != sopen[1] ? na : lime

//Daily Range
highrange1 = security(tickerid, 'D', h)
highrange2 = security(tickerid, 'D', h1)
lowrange1 = security(tickerid, 'D', l)
lowrange2 = security(tickerid, 'D', l1)

highrange3 = (highrange1 + highrange2) /2
lowrange3 = (lowrange1 + lowrange2) /2

offs_daily = 0
//H1=plot(sr and highrange1 ? highrange1 : na, title=Daily High1,color=hcolor, linewidth=1)
H1=plot(sr and highrange3 ? highrange3 : na, title=Daily High1,color=hcolor, linewidth=1)
H2=plot(sr and highrange2 ? highrange2 : na, title=Daily Daily High2, color=hcolor1, linewidth=1)
//L1=plot(sr and lowrange1 ? lowrange1 : na, title=Daily Low1,color=lcolor, linewidth=1)
L1=plot(sr and lowrange3 ? lowrange3 : na, title=Daily Low1,color=lcolor, linewidth=1)
L2=plot(sr and lowrange2 ? lowrange2 : na, title=Daily Daily Low2, color=lcolor1, linewidth=1)

fill(H1,H2,color=maroon)
fill(L1,L2,color=lime)

Hi @papair

Seems your script is plotting Daily repainting daily Fibonacci pivots

I saw some issues in that script that must be fixed to remove the repainting side-effect

Hi @daveatt

Thanks for your response. I was actually looking for a detailed description of what this script does. My trading system is based on tradescript, so i wanted to convert this code to that platform.
But the problem is i am not so good with pinescript, so i am not able to understand how it is getting these values.

For example:=

What is :-

range[1]
highrange2 = security(tickerid, 'D', h1)

You may want to read the documentation for that
https://www.tradingview.com/pine-script-reference/v4/#fun_label%7Bdot%7Dnew
and that one https://www.pinecoders.com/faq_and_code/

range[1] means accessing the previous range variable value

highrange2 = security(tickerid, 'D', h1) = means access the current daily h1 variable value