diff --git a/core.c b/core.c
new file mode 100644
index 0000000..f9367f1
--- /dev/null
+++ b/core.c
@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "core.h"
+
+int virus1Address, virus2Address;
+
+int setupViruses(long memory[8000]) {
+    srand(time(NULL));
+    int randAddress = rand() % 8000;
+    int virusLines = 0;
+    long instruction;
+
+    virus1Address = randAddress;
+
+    FILE* virusFile = fopen("redcode/virus1.mars", "r");
+
+    if (virusFile) {
+        fseek(virusFile, 0L, SEEK_SET);
+        while (!feof(virusFile)) {
+            instruction = 0;
+            fscanf(virusFile, "%ld", &instruction);
+            memory[(randAddress + virusLines) % 8000] = instruction;
+            virusLines++;
+        }
+    } else {
+        puts("Could not load Virus 1.");
+        return 0;
+    }
+
+    fclose(virusFile);
+    srand(rand());
+
+    virusFile = fopen("redcode/virus2.mars", "r");
+
+    if (virusFile) {
+        long trash;
+        while(!feof(virusFile)) {
+            fscanf(virusFile, "%ld", &trash);
+            virusLines++;
+        }
+
+        fseek(virusFile, 0L, SEEK_SET);
+
+        randAddress = (randAddress + rand()) % (8000 - virusLines);
+        virus2Address = randAddress;
+        virusLines = 0;
+        
+        while (!feof(virusFile)) {
+            instruction = 0;
+            fscanf(virusFile, "%ld", &instruction);
+            memory[(randAddress + virusLines) % 8000] = instruction;
+            virusLines++;
+        }
+    } else {
+        puts("Could not load Virus 1.");
+        return 0;
+    }
+
+    fclose(virusFile);
+}
+
+void execInst(int address, long instruction) {
+
+}
\ No newline at end of file
diff --git a/core.h b/core.h
new file mode 100644
index 0000000..22f476e
--- /dev/null
+++ b/core.h
@@ -0,0 +1,7 @@
+#ifndef MARS_H
+#define MARS_H
+
+int setupViruses(long memory[8000]);
+void execInst(int address, long instruction);
+
+#endif
\ No newline at end of file