diff --git a/projects/04/tests/SumToN.asm b/projects/04/tests/SumToN.asm
new file mode 100644
index 0000000..290d1fe
--- /dev/null
+++ b/projects/04/tests/SumToN.asm
@@ -0,0 +1,45 @@
+// Program: Sum1ToN (R0 represents N)
+// Computes R1 = 1 + 2 + 3 + ... + R0
+// Usage: put a value >= 1 in R0
+// i = 1
+
+
+
+
+@i 
+M=1
+// sum = 0
+
+@sum 
+M=0 
+
+(LOOP) // if (i > R0) goto STOP 
+    @i 
+    D=M 
+    @R0 
+    D=D-M 
+    @STOP 
+    D;JGT // sum = sum + i 
+    @sum 
+    D=M 
+    @i 
+    D=D+M 
+    @sum 
+    M=D
+    // i = i + 1
+    @i 
+    M=M+1 // goto LOOP 
+
+@LOOP 
+0;JMP
+
+(STOP)
+    // R1 = sum
+    @sum 
+    D=M 
+    @R1 
+    M=D // infinite loop 
+
+(END) 
+    @END 
+    0;JMP
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