diff --git a/cron/generateCustomData.php b/cron/generateCustomData.php
index 5be2bc0..2055071 100644
--- a/cron/generateCustomData.php
+++ b/cron/generateCustomData.php
@@ -48,8 +48,11 @@
     $file = tmpfile();
     $fileName = stream_get_meta_data($file)['uri'];
 
-    foreach ($summary as $row)
-      fwrite($file, $row["data"]." ".$row["ia14"]." ".$row["rho7"]."\n");
+    $i = 0;
+    foreach ($summary as $row) {
+      fwrite($file, $row["data"]." ".$row["ia14"]." ".$row["rho7"]." ".$i."\n");
+      ++$i;
+    }
 
     // Cridem al gnuplot perquè generi la gràfica
     shell_exec("gnuplot -c generateCustomGraph.gnu \"".escapeshellcmd($area["name"])."\" \"".escapeshellcmd($area["codename"])."\" \"".escapeshellcmd($fileName)."\"");
diff --git a/cron/generateCustomGraph.gnu b/cron/generateCustomGraph.gnu
index 7f1e73f..fe88560 100644
--- a/cron/generateCustomGraph.gnu
+++ b/cron/generateCustomGraph.gnu
@@ -7,7 +7,6 @@
 set terminal svg size 500, 500
 set output '/tmp/covid19graphgenerator-area-'.codeName.'-graph.svg'
 
-set pointsize 0.75
 load "includes/plotCustomGraph.gnu"
 
 set terminal png size 500, 500
diff --git a/cron/generateData.php b/cron/generateData.php
index 996fdcd..363f346 100644
--- a/cron/generateData.php
+++ b/cron/generateData.php
@@ -61,8 +61,11 @@
 foreach ($summary as $regio => $summaryRegio) {
   $file = fopen("/tmp/covid19graphgenerator-".$CODENAME[$regio].".dat", "w");
 
-  foreach ($summaryRegio as $row)
-    fwrite($file, $row["data"]." ".$row["ia14"]." ".$row["rho7"]."\n");
+  $i = 0;
+  foreach ($summaryRegio as $row) {
+    fwrite($file, $row["data"]." ".$row["ia14"]." ".$row["rho7"]." ".$i."\n");
+    ++$i;
+  }
 
   fclose($file);
 }
diff --git a/cron/generateGraphs.gnu b/cron/generateGraphs.gnu
index 665641d..dd9f137 100644
--- a/cron/generateGraphs.gnu
+++ b/cron/generateGraphs.gnu
@@ -3,7 +3,6 @@
 set terminal svg size 1200, 1200
 set output '/tmp/covid19graphgenerator-output.svg'
 
-set pointsize 0.75
 load "includes/plotAllGraphs.gnu"
 
 set terminal png size 1600, 1600
diff --git a/cron/includes/plotSingleGraph.gnu b/cron/includes/plotSingleGraph.gnu
index 152fd11..0ddc61b 100644
--- a/cron/includes/plotSingleGraph.gnu
+++ b/cron/includes/plotSingleGraph.gnu
@@ -1,2 +1,11 @@
-set title graphTitle."\n{/*0.4 Última dada (punt negre): ".lastUpdated."}"
-plot 6*x w filledcurve y1=0 lt rgb "#ff9494", 100/x w filledcurve y1=0 lt rgb "#ffe494", 70/x w filledcurve y1=0 lt rgb "#dbff94", 30/x w filledcurve y1=0 lt rgb "#a0ff94", graphDataFile u 2:3 w lp pt 6 lt rgb "black", "< tail -n 1 ".graphDataFile u 2:3 w lp pt 7 lt rgb "black"
+num = system("cat ".graphDataFile." | wc -l")
+
+startGray = 0;
+endGray = 0.5;
+
+set palette model RGB functions startGray + (endGray - startGray)*(1 - gray), startGray + (endGray - startGray)*(1 - gray), startGray + (endGray - startGray)*(1 - gray)
+set cbrange [0:(num - 1)]
+unset colorbox
+
+set title graphTitle."\n{/*0.4 Última dada (punt blau): ".lastUpdated."}"
+plot 6*x w filledcurve y1=0 lt rgb "#ff9494", 100/x w filledcurve y1=0 lt rgb "#ffe494", 70/x w filledcurve y1=0 lt rgb "#dbff94", 30/x w filledcurve y1=0 lt rgb "#a0ff94", graphDataFile u 2:3:4 w lp lc palette pt 2 ps 0.5, "< tail -n 1 ".graphDataFile u 2:3 w lp pt 7 ps 0.7 lt rgb "#002991"