1 files changed, 13 insertions, 0 deletions
diff --git a/interface.ccl b/interface.ccl
index 1009f1e..aea0edc 100644
--- a/interface.ccl
+++ b/interface.ccl
@@ -3,3 +3,16 @@
 
 implements: time
 
+protected:
+
+REAL speedvars type=SCALAR
+{
+  wave_speed
+} "Speed to use for Courant condition"
+
+private:
+
+REAL couranttemps type=SCALAR
+{
+  courant_dt
+} "Variable just for output"
+\ No newline at end of file