diff --git a/quad12/labmoderna/p2/r/KCl.r b/quad12/labmoderna/p2/r/KCl.r
new file mode 100644
index 0000000..4c9857b
--- /dev/null
+++ b/quad12/labmoderna/p2/r/KCl.r
@@ -0,0 +1,33 @@
+library(svglite)
+
+filename = 'KCl'
+scale <- 1.5 # Scale compared to the Na_smoothest (for the arrows and text)
+
+args = commandArgs(trailingOnly=TRUE)
+
+table <- read.table(paste0('dades/', filename, '.txt'), sep="\t", dec='.', header=TRUE)
+
+# Plot the data
+plotall <- function() {
+  plot(table$ChannelNumber, table$Impulses, type="l", col="#EEEEFF", xlab="Número de canal", ylab="Comptes")
+  lines(table$ChannelNumber, table$ImpulsesSmooth, type="l")
+
+  # Add arrows and text labels to the peaks
+  i <- 2499 + 1
+  arrows(table$ChannelNumber[i], table$ImpulsesSmooth[i] + scale*(3 + 2), table$ChannelNumber[i], table$ImpulsesSmooth[i] + scale*0.2, length = 0.05, code = 1, col = "#514E7E")
+  text(table$ChannelNumber[i], table$ImpulsesSmooth[i] + scale*(5.2 + 2), bquote(atop(gamma["1,0"] * (Ar), 1409 ~ keV)), col = "#514E7E", cex = 0.75)
+
+  i <- 423 + 1
+  arrows(table$ChannelNumber[i], table$ImpulsesSmooth[i] + scale*3, table$ChannelNumber[i], table$ImpulsesSmooth[i] + scale*0.2, length = 0.05, code = 1, col = "#799B6F")
+  text(table$ChannelNumber[i], table$ImpulsesSmooth[i] + scale*5.2, bquote(atop(BS ~ gamma["1,0"] * (Ar), 217 ~ keV)), col = "#799B6F", cex = 0.75)
+}
+
+pdf(paste0('output/', filename, '.pdf'), width = 6, height = 5)
+plotall()
+dev.off()
+
+if (length(args) < 1 || args[1] != "preview") {
+  svg(paste0('output/', filename, '.svg'), width = 6, height = 5)
+  plotall()
+  dev.off()
+}