I need help on getting a card selecter to work. Please?

I am trying to create a game where it displays a random poker card, but I cannot get it to work. Here is the code I am using:

c1 = game.workspace.c1.Decal
function onClicked()
	local a = math.random("1", "52")
	print(a)
	if a==1 then
		c1.Texture=rbxassetid://393533133
	elseif a==2 then
		c1.Texture=rbxassetid://171982569
	elseif a==3 then
		c1.Texture=rbxassetid://171982595
	elseif a==4 then
		c1.Texture=rbxassetid://171984344
	elseif a==5 then
		c1.Texture=rbxassetid://171984333
	elseif a==6 then
		c1.Texture=rbxassetid://171984320
	elseif a==7 then
		c1.Texture=rbxassetid://171984303
		elseif a==8 then
		c1.Texture=rbxassetid://171982720
		elseif a==9 then
		c1.Texture=rbxassetid://171982735
		elseif a==10 then
		c1.Texture=rbxassetid://171982748
		elseif a==11 then
		c1.Texture=rbxassetid://171982776
		elseif a==12 then
		c1.Texture=rbxassetid://171982807
		elseif a==13 then
		c1.Texture=rbxassetid://171982794
		elseif a==14 then
		c1.Texture=rbxassetid://171982338
		elseif a==15 then
		c1.Texture=rbxassetid://171982229
		elseif a==16 then
		c1.Texture=rbxassetid://171982240
		elseif a==17 then
		c1.Texture=rbxassetid://171982250
		elseif a==18 then
		c1.Texture=rbxassetid://171982260
		elseif a==19 then
		c1.Texture=rbxassetid://171982268
		elseif a==20 then
		c1.Texture=rbxassetid://171982281
		elseif a==21 then
		c1.Texture=rbxassetid://171982292
		elseif a==22 then
		c1.Texture=rbxassetid://171982315
		elseif a==23 then
		c1.Texture=rbxassetid://171982324
		elseif a==24 then
		c1.Texture=rbxassetid://171982376
		elseif a==25 then
		c1.Texture=rbxassetid://171982420
		elseif a==26 then
		c1.Texture=rbxassetid://171982407
		elseif a==27 then
		c1.Texture=rbxassetid://171983024
		elseif a==28 then
		c1.Texture=rbxassetid://171982928
		elseif a==29 then
		c1.Texture=rbxassetid://171982942
		elseif a==30 then
		c1.Texture=rbxassetid://171982949
		elseif a==31 then
		c1.Texture=rbxassetid://171982956
		elseif a==32 then
		c1.Texture=rbxassetid://171982965
		elseif a==33 then
		c1.Texture=rbxassetid://171982976
		elseif a==34 then
		c1.Texture=rbxassetid://171982986
		elseif a==35 then
		c1.Texture=rbxassetid://171983007
		elseif a==36 then
		c1.Texture=rbxassetid://171983010
		elseif a==37 then
		c1.Texture=rbxassetid://171983031
		elseif a==38 then
		c1.Texture=rbxassetid://171983046
		elseif a==39 then
		c1.Texture=rbxassetid://171983040
		elseif a==40 then
		c1.Texture=rbxassetid://171982129
		elseif a==41 then
		c1.Texture=rbxassetid://171981991
		elseif a==42 then
		c1.Texture=rbxassetid://171982041
		elseif a==43 then
		c1.Texture=rbxassetid://171982049
		elseif a==44 then
		c1.Texture=rbxassetid://171982055
		elseif a==45 then
		c1.Texture=rbxassetid://171982068
		elseif a==46 then
		c1.Texture=rbxassetid://171982074
		elseif a==47 then
		c1.Texture=rbxassetid://171982085
		elseif a==48 then
		c1.Texture=rbxassetid://171982096
		elseif a==49 then
		c1.Texture=rbxassetid://171982119
		elseif a==50 then
		c1.Texture=rbxassetid://171982151
		elseif a==51 then
		c1.Texture=rbxassetid://171982169
		elseif a==52 then
        c1.Texture=rbxassetid://171982157
	end
end

game.Workspace.Reset.ClickDetector.MouseClick:connect(onClicked)

I get the error (6,25) Expected identifier, got '/' in Script Analysis, as well as error Workspace.Reset.Script:6: '' expected near '/' in output.

Building upon 1N0body comment there are two general rules of programming which needs to be looked at.

"Duplicate code" - a big giveaway that your design/method of codeing needs to be changed, we write code once and only once. Then we can re-use it, this makes our code much more maintainable in the long run. There may be exceptions to this.

"Maintainability" - with this current design of code it would take a long time to add to e.g. in the middle of your if statements as well as you have fixed variables for something which may change.

optimize code

local c1 = game.workspace.c1.Decal

-- just make a list so we dont need have lots of elseif 
local textureList = {
	'rbxassetid://393533133','rbxassetid://171982569','rbxassetid://171982595','rbxassetid://171984344',
	'rbxassetid://171984333','rbxassetid://171984320','rbxassetid://171984303','rbxassetid://171982720',
	'rbxassetid://171982735','rbxassetid://171982748','rbxassetid://171982776','rbxassetid://171982807',
	'rbxassetid://171982794','rbxassetid://171982338','rbxassetid://171982229','rbxassetid://171982240',
	'rbxassetid://171982250','rbxassetid://171982260','rbxassetid://171982268','rbxassetid://171982281',
	'rbxassetid://171982292','rbxassetid://171982315','rbxassetid://171982324','rbxassetid://171982376',
	'rbxassetid://171982420','rbxassetid://171982407','rbxassetid://171983024','rbxassetid://171982928',
	'rbxassetid://171982942','rbxassetid://171982949','rbxassetid://171982956','rbxassetid://171982965',
	'rbxassetid://171982976','rbxassetid://171982986','rbxassetid://171983007','rbxassetid://171983010',
	'rbxassetid://171983031','rbxassetid://171983046','rbxassetid://171983040','rbxassetid://171982129',
	'rbxassetid://171981991','rbxassetid://171982041','rbxassetid://171982049','rbxassetid://171982055',
	'rbxassetid://171982068','rbxassetid://171982074','rbxassetid://171982085','rbxassetid://171982096',
	'rbxassetid://171982119','rbxassetid://171982151','rbxassetid://171982169','rbxassetid://171982157'
}

function onClicked()
    local num = math.random(1, #textureList) -- the #  is used to get then number of elements within the table
	--this means that we do not need to change this code when we add or remove from the list
	
	print(num)
	c1.Texture=textureList[num] -- instead of using the long if statement we can simply pick the index from out pre made table
	-- this save both processing time and allows us to easily add to the list
end

game.Workspace.Reset.ClickDetector.MouseClick:connect(onClicked)