diff --git a/SICP/exercise_1_12.janet b/SICP/exercise_1_12.janet
new file mode 100644
index 0000000..de18382
--- /dev/null
+++ b/SICP/exercise_1_12.janet
@@ -0,0 +1,21 @@
+
+(defn pascal [x y]
+  (cond
+    (<= x 0) 0
+    (> x y) 0
+    (<= y 1) 1
+    (+ (pascal (- x 1) (- y 1)) (pascal x (- y 1)))))
+
+(def max_val 15)
+(var x 1)
+(var y 0)
+(while (< y max_val)
+  (cond
+    (> x y) (do
+              (set x 1)
+              (set y (+ y 1))
+              (print "")
+              (prin (string/repeat " " (- max_val y))))
+    (do
+      (prin (string/format " %d" (pascal x y)))
+      (set x (+ x 1)))))