diff --git a/.drone.yml b/.drone.yml
index d2f37e9..4910f41 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -13,13 +13,29 @@ steps:
   - cmake CMakeLists.txt
   - make
 
-- name: valgrind-test
-  pull: always
+- name: valgrind-test0
+  pull: if-not-exists
   image: immawanderer/archlinux-cdev
   commands:
-  - valgrind --log-file=valgrind_output ./pjc-0x02 < ./test_input > output
+  - valgrind --log-file=valgrind_output ./pjc-0x02 < ./test_input0 > /dev/null
   - cat valgrind_output
   - grep "no leaks are possible" valgrind_output
+  when:
+    status:
+    - success
+    - failure
+
+- name: valgrind-test1
+  pull: if-not-exists
+  image: immawanderer/archlinux-cdev
+  commands:
+  - valgrind --log-file=valgrind_output ./pjc-0x02 < ./test_input1 > /dev/null
+  - cat valgrind_output
+  - grep "no leaks are possible" valgrind_output
+  when:
+    status:
+    - success
+    - failure
 
 
 ---
diff --git a/main.c b/main.c
index 6a7514b..da22964 100644
--- a/main.c
+++ b/main.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <time.h>
 #include <stdlib.h>
+#include <math.h>
 
 void print_menu(){
     printf("\n[*] guess a number from 0 to 10\n");
@@ -33,6 +34,7 @@ int get_userguess(){
         ok = scanf("%d", &x);
         if(ok == EOF){
             printf("[*] please, come on...\n");
+            return 9000;
         }
         if(ok == 0){
             while (fgetc(stdin) != '\n'){
@@ -73,6 +75,7 @@ void guess(){
             ok = scanf("%d", &userchoice);
             if(ok == EOF){
                 printf("[*] please, come on...\n");
+                return;
             }
             if(ok == 0){
                 while (fgetc(stdin) != '\n'){
@@ -126,9 +129,116 @@ void print_rand_bs(){
     }
 }
 
-int main()
+void read_selection(int selection){
+    int ok;
+    while(ok != 1) {
+        ok = scanf("%d", &selection);
+        if(ok == EOF){
+            printf("[*] please, come on...\n");
+            return;
+        }
+        if(ok == 0){
+            while (fgetc(stdin) != '\n'){
+            }
+            lemmego();
+            return;
+        }
+    }
+}
+
+
+void default_flow(char operator, int a, int b, int result){
+    int answer = 0;
+    printf("a: %d\tb: %d\n", a, b);
+    printf("what is %d %c %d?\n>> ", a, operator, b);
+    answer = get_userguess();
+    if (answer == result){
+        printf("splendid. you win %d czk!\n", rand());
+    }
+    else {
+        printf("incorrect, %d %c %d is %d.\n", a, operator, b, result);
+    }
+}
+
+void another_bs(){
+    int a, b, result, answer, selection;
+    int upper_limit = 10;
+
+    srand(time(NULL));
+
+    printf("\n\nwelcome to the math game\n");
+    while ( selection != 8 ) {
+        printf("\npick a number\n");
+        printf("1 - addition\n"
+               "2 - subtraction\n"
+               "3 - multiplication\n"
+               "4 - division\n"
+               "5 - modulo\n"
+               "6 - set upper_limit for x = rand() mod upper_limit\n"
+               "7 - XOR\n"
+               "8 - quit\n"
+               ">> ");
+
+        selection = get_userguess();
+
+        a= 1 + (rand() % upper_limit);
+        b = 1 + (rand() % upper_limit);
+
+        switch ( selection ) {
+            case 1:
+                result = a + b;
+                default_flow('+', a, b, result);
+                break;
+            case 2:
+                result = a - b;
+                default_flow('-', a, b, result);
+                break;
+            case 3:
+                result = a * b;
+                default_flow('*',a , b, result);
+                break;
+            case 4:
+                result = a / b;
+                default_flow('/', a, b, result);
+                break;
+            case 5:
+                printf("a: %d\tb: %d\n", a, b);
+                result = a % b;
+                printf("what is %d mod %d?\n>> ", a, b);
+                answer = get_userguess();
+                if (answer == result)
+                    printf("splendid. you win %d czk!\n", rand());
+                else
+                    printf("incorrect, %d mod %d je %d.\n", a, b, result);
+                break;
+            case 6:
+                printf("    default limit: 10\n"
+                       " *  current limit: %d\n", upper_limit);
+                printf("    new limit\t>> ");
+                upper_limit = get_userguess();
+                printf("\n *  new limit: %d\n", upper_limit);
+                break;
+            case 7:
+                result = a ^ b;
+                default_flow('^',a, b, result);
+                break;
+            case 8:
+                printf("quitting...\n");
+                lemmego();
+                return;
+            default:
+                printf("invalid option\n");
+                selection = 0;
+                break;
+        }
+    }
+}
+
+
+int main(int argc, char *argv[])
 {
-    guess();
     print_rand_bs();
+    guess();
+    another_bs();
     return 0;
 }
diff --git a/test_input b/test_input0
similarity index 94%
rename from test_input
rename to test_input0
index 92a694c..97f2feb 100644
--- a/test_input
+++ b/test_input0
@@ -11,3 +11,4 @@ ok1
 2
 2
 ktxbai
+8
diff --git a/test_input1 b/test_input1
new file mode 100644
index 0000000..1b6770d
--- /dev/null
+++ b/test_input1
@@ -0,0 +1,16 @@
+q
+1
+323
+2
+3
+2
+4
+1
+5
+4
+6
+9000
+7
+9001
+gibberish
+8