diff --git a/params/vani_ppractice.R b/params/vani_ppractice.R
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+
+# input parameters
+
+# sigma2: 0 < value < 5
+sig2 <- 0.3
+
+# e.g. "anas_krystallinus"
+species.name <- "vani_rocks"
+
+# e.g. "red"
+color <- "pink"
+
+# tip: pick a color using rstudio colour picker.
+# Addins > Colour Picker (to install: install.packages("colourpicker"))
+  # Note: please do not include install.packages("PKG-NAME") in your final R script!
+  # This can break part of our rendering pipeline. Please install at your command
+  # line or simply ask your instructor if uncertain.
+# If you use this, don't forget to put it back as a comment
+# before pushing and creating your pull request.